2 Is this value from a discrete or continuous data set The average weight of newborn babies in ounces A Qualitative (Categorical) B Quantitative Continuous C Quantitative Discrete 3 Determine if the following is an example of descriptive or inferential statistics 85 randomly selected fifty year old Americans were asked how much money they had saved for their retirement The average for these respondents was $25,000, the minimum was $0 and the maximum was $1,200,000 A Descriptive Statistics B Inferential Statistics 4 A restaurant owner is interested in the proportion of his customers who order dessert He looks at 65 randomly selected receipts Match the vocabulary word with its corresponding example abcdef The 65 restaurant patrons whose receipts were observed by the owner abcdef The list of the 65 Yes or No answers for whether each customer ordered dessert abcdef The proportion of the 65 randomly selected customers who ordered dessert abcdef The answer Yes or No to whether a customer ordered dessert abcdef The proportion of all customers who order dessert abcdef All customers who come to the restaurant Population Parameter Statistic Data Variable Sample 5 Researchers are studying the relationship between honesty, age, and self control conducted an experiment on 160 children between the ages of 5 and 15 The researchers asked each child to toss a fair coin in private and to record the outcome (heads or tails) on a paper sheet, and said they would only reward children who report heads Half the students were explicitly told not to cheat and the others were not given any explicit instructions Differences were observed in the cheating rates in the instruction and no instruction groups, as well as some differences across children's characteristics within each group a) Identify the population of interest in the study 160 children between the ages of 5 and 15 80 children between the ages of 5 and 15 who were told not to cheat The researchers All children between the ages of 5 and 15 b) Identify the sample for this study All children between the ages of 5 and 15 160 children between the ages of 5 and 15 The researchers 80 children between the ages of 5 and 15 who were told not to cheat c) Can the results of the study can be generalized to the population Should the findings of the study can be used to establish causal relationships If the sample is randomly selected and representative of the entire population, then the results can be generalized to the target population Furthermore, since this study is observational, the findings can be used to infer causal relationships If the sample is randomly selected and representative of the entire population, then the results can be generalized to the target population Furthermore, since this study is experimental, the findings cannot be used to infer causal relationships If the sample is randomly selected and representative of the entire population, then the results can be generalized to the target population Furthermore, since this study is experimental, the findings can be used to infer causal relationships If the sample is randomly selected and representative of the entire population, then the results can be generalized to the target population Furthermore, since this study is observational, the results cannot be used to infer causal relationships 6 Political pollsters may be interested in the proportion of people that will vote for a particular cause Match the vocabulary word with its corresponding example abcdef The proportion of the 750 survey participants who will vote for the cause abcdef The proportion of all voters from the district who will vote for the cause abcdef The 750 voters who participated in the survey abcdef All the voters in the district abcdef The answer Yes or No to the survey question abcdef The list of 750 Yes or No answers to the survey question Parameter Sample Statistic Variable Data Population 7 A rancher is interested in the average age that a cow begins producing milk Match the vocabulary word with its corresponding example abcdef The 62 milk cows that were observed by the rancher abcdef The age when a milk cow first produced milk abcdef The average age for the 62 observed milk cows as they first produced milk abcdef The average age that all milk cows are when they first produce milk abcdef All milk cows abcdef The list of the 62 ages Parameter Data Population Variable Statistic Sample 8 A researcher wants to survey 2000 Americans for an obesity study Match the strategies to their corresponding sampling techniques abcde The researcher picks 20 different small groups a church group a Democrat club a student club etc each containing 100 people Then the researcher makes sure that everyone from each group answers the survey question abcde The researcher posts the survey on the Internet the survey question and waits until 2000 people have responded abcde The researcher gets the complete list from the Census Bureau and surveys every 1500th person on the list abcde The researcher makes sure that the proportion of respondents from each state matches the proportion of each state's population to the US population abcde The researcher gets the complete list from the Census Bureau and uses a computer to randomly select 2000 people Cluster Sampling Convenience Sampling Stratified Sampling Simple Random Sampling Systematic Sampling 9 In a study, the sample is chosen by pulling 20 names from a bag What is the sampling method Simple Random Systematic Stratified Cluster Convenience 10 In a study, the data you collect is Habits on a Always Sometimes Never scale What is the level of measurement nominal ordinal interval ratio 11 Does this describe an observational study or an experiment A drug is given to a group of people, and their reactions observed a Experiment b Observational Study 12 A team of researchers is testing the effectiveness of a new HPV vaccine They randomly divide the subjects into two groups Group 1 receives new HPV vaccine, and Group 2 receives a placebo Neither the patients or the doctors examining them knew which group they were in Which is the treatment group Group 1 Group 2 Neither group Which is the control group (if there is one) Group 1 Group 2 No control group Is this study blind, double blind, or neither Blind Double blind Neither 13 Match the following vocabulary terms with the corresponding definitions Vocabulary Terms abcde experiment abcde experimental units abcde retrospective study abcde treatment abcde observational study Definitions a study in which data is collected without anything being done to the subjects experimental conditions imposed on the subjects a study in which a treatment is applied and responses are observed a study in which data from the past is examined The people, animals or things on whom experiments are performed 14 As part of a statistics project, Charlie would like to collect data on household size in his city To do so, he asks each person in his statistics class for the size of their household and reports the results of a simple random sample However, this is not a simple random sample Why Charlie did not use any randomization he took a convenience sample Charlie did not use a random number table to randomize the order in which he collected the students' responses, so the sample cannot be random In this investigation of household size, each household represents a case Charlie incorrectly sampled individuals instead of households Both (a) and (c) are correct Answers (a), (b), and (c) are all correct 15 Which of the following are reasons that a sampling technique may not be scientific Choose all that apply Self Selected Sample The sample statistic is not exactly equal to the population parameter The sample size is too small The wording of survey question influences the response The sample is not representative of the population 16 Determine whether the following is an example of a sampling error or a non sampling error A researcher studied brother sister pairs to see if there is a difference in IQ scores Although the researcher made no mistakes in collecting the data, the findings showed that there was a difference when in reality there is no difference in IQ based on gender Non Sampling Error Sampling Error 17 Which of the following are reasons that a sampling technique may not be scientific Choose all that apply The researcher was not able to survey every individual from the population People who were asked refused to answer The graphs are drawn in a way to mislead the reader Two factors cannot be separated to determine which is the one that is responsible for the outcome The funders of the project are partial to the results Trying to conclude that there is a cause and effect relationship when something else causes both 18 Would the following method produce a random sample Separating all books by subjects such that there are an equal number of books on each subject, and selecting 4 from each subject grouping Yes No 19 If the sample size is much smaller than the population size, say 20 times smaller, then random sampling with replacement and random sampling without replacement are nearly equivalent True False 20 Data was collected for 300 fish from the North Atlantic The length of the fish (in mm) is summarized in the GFDT below Lengths (mm) Frequency 140 149 1 150 159 16 160 169 71 170 179 108 180 189 83 190 199 18 200 209 3 What is the lower class boundary for the first class class boundary 21 240 people are asked how many siblings they have of Siblings Frequency Relative Frequency Cumulative Frequency 0 47 0 1958 47 1 55 2 0 1583 140 3 56 0 2333 196 4 44 0 1833 240 a Complete the table (Use 4 decimal places when applicable) b What percent of the people have exactly zero siblings 22 The following data represents the age of 30 lottery winners 22 25 28 32 35 39 40 43 44 45 47 47 50 54 54 54 55 55 57 58 60 61 62 67 68 68 68 69 70 87 Complete the frequency distribution for the data Age Frequency 20 29 30 39 40 49 50 59 60 69 70 79 80 89 23 In a student survey, forty one part time students were asked how many courses they were taking this term The (incomplete) results are shown below Please round your answer to 4 decimal places for the Relative Frequency if possible of Courses Frequency Relative Frequency Cumulative Frequency 1 13 0 3171 13 2 0 2927 25 3 16 What percent of students take exactly three courses 24 Home Sales Prices (hundred thousands) (ten thousands) 0 667778999 1 02447778889999 2 0011234445667889 3 00011225 The stem and leaf plot above shows house sale prices over the last week in Tacoma What was the most expensive house sold Give your answer in dollars $ 25 Data was collected for a sample of organic snacks The amount of sugar in mg in each snack is summarized in the histogram below Which statement best describes the meaning of one of the bars in the histogram I2 It 121' 340 1150 330 249i 221' 2419 215i amount ofsugar mg 3 0 15B snacks have 2 mg of sugar O 1513 snacks have between 1443 and 1450' mg of sugar 3' The largest number of snacks have 13 mg of sugar 0 2 snacks have about 15D mg of sugar

Question

2    Is this value from a discrete or continuous data set  The average weight of newborn babies in ounces A  Qualitative (Categorical) B  Quantitative   Continuous C  Quantitative   Discrete 3  Determine if the following is an example of descriptive or inferential statistics  85 randomly selected fifty year old Americans were asked how much money they had saved for their retirement  The average for these respondents was $25,000, the minimum was $0 and the maximum was $1,200,000  A  Descriptive Statistics B  Inferential Statistics 4  A restaurant owner is interested in the proportion of his customers who order dessert  He looks at 65 randomly selected receipts  Match the vocabulary word with its corresponding example              abcdef The 65 restaurant patrons whose receipts were observed by the owner             abcdef The list of the 65 Yes or No answers for whether each customer ordered dessert                 abcdef The proportion of the 65 randomly selected customers who ordered dessert               abcdef The answer  Yes or No to whether a customer ordered dessert               abcdef The proportion of all customers who order dessert                abcdef All customers who come to the restaurant Population Parameter Statistic Data Variable Sample 5  Researchers are studying the relationship between honesty, age, and self control conducted an experiment on 160 children between the ages of 5 and 15  The researchers asked each child to toss a fair coin in private and to record the outcome (heads or tails) on a paper sheet, and said they would only reward children who report heads  Half the students were explicitly told not to cheat and the others were not given any explicit instructions  Differences were observed in the cheating rates in the instruction and no instruction groups, as well as some differences across children's characteristics within each group  a) Identify the population of interest in the study  160 children between the ages of 5 and 15 80 children between the ages of 5 and 15 who were told not to cheat The researchers All children between the ages of 5 and 15 b) Identify the sample for this study  All children between the ages of 5 and 15 160 children between the ages of 5 and 15 The researchers 80 children between the ages of 5 and 15 who were told not to cheat c) Can the results of the study can be generalized to the population  Should the findings of the study can be used to establish causal relationships  If the sample is randomly selected and representative of the entire population, then the results can be generalized to the target population  Furthermore, since this study is observational, the findings can be used to infer causal relationships  If the sample is randomly selected and representative of the entire population, then the results can be generalized to the target population  Furthermore, since this study is experimental, the findings cannot be used to infer causal relationships  If the sample is randomly selected and representative of the entire population, then the results can be generalized to the target population  Furthermore, since this study is experimental, the findings can be used to infer causal relationships  If the sample is randomly selected and representative of the entire population, then the results can be generalized to the target population  Furthermore, since this study is observational, the results cannot be used to infer causal relationships  6  Political pollsters may be interested in the proportion of people that will vote for a particular cause  Match the vocabulary word with its corresponding example               abcdef The proportion of the 750 survey participants who will vote for the cause             abcdef The proportion of all voters from the district who will vote for the cause                abcdef The 750 voters who participated in the survey             abcdef All the voters in the district          abcdef The answer Yes or No to the survey question                  abcdef The list of 750 Yes or No answers to the survey question Parameter Sample Statistic Variable Data Population 7  A rancher is interested in the average age that a cow begins producing milk  Match the vocabulary word with its corresponding example                        abcdef The 62 milk cows that were observed by the rancher            abcdef The age when a milk cow first produced milk            abcdef The average age for the 62 observed milk cows as they first produced milk            abcdef The average age that all milk cows are when they first produce milk                 abcdef All milk cows               abcdef The list of the 62 ages Parameter Data Population Variable Statistic Sample 8  A researcher wants to survey 2000 Americans for an obesity study  Match the strategies to their corresponding sampling techniques             abcde The researcher picks 20 different small groups a church group a Democrat club a student club etc  each containing 100 people  Then the researcher makes sure that everyone from each group answers the survey question            abcde The researcher posts the survey on the Internet the survey question and waits until 2000 people have responded            abcde The researcher gets the complete list from the Census Bureau and surveys every 1500th person on the list             abcde The researcher makes sure that the proportion of respondents from each state matches the proportion of each state's population to the US population                   abcde The researcher gets the complete list from the Census Bureau and uses a computer to randomly select 2000 people  Cluster Sampling Convenience Sampling Stratified Sampling Simple Random Sampling Systematic Sampling 9  In a study, the sample is chosen by pulling 20 names from a bag What is the sampling method                         Simple Random          Systematic                Stratified                Cluster            Convenience 10  In a study, the data you collect is Habits on a Always Sometimes Never scale  What is the level of measurement                  nominal          ordinal           interval           ratio 11  Does this describe an observational study or an experiment  A drug is given to a group of people, and their reactions observed a  Experiment b  Observational Study 12  A team of researchers is testing the effectiveness of a new HPV vaccine  They randomly divide the subjects into two groups  Group 1 receives new HPV vaccine, and Group 2 receives a placebo  Neither the patients or the doctors examining them knew which group they were in  Which is the treatment group        Group 1        Group 2        Neither group Which is the control group (if there is one)         Group 1         Group 2       No control group Is this study blind, double blind, or neither         Blind         Double blind         Neither 13  Match the following vocabulary terms with the corresponding definitions  Vocabulary Terms  abcde experiment  abcde experimental units  abcde retrospective study  abcde treatment  abcde observational study Definitions a study in which data is collected without anything being done to the subjects experimental conditions imposed on the subjects a study in which a treatment is applied and responses are observed a study in which data from the past is examined The people, animals or things on whom experiments are performed 14  As part of a statistics project, Charlie would like to collect data on household size in his city  To do so, he asks each person in his statistics class for the size of their household and reports the results of a simple random sample  However, this is not a simple random sample  Why  Charlie did not use any randomization  he took a convenience sample  Charlie did not use a random number table to randomize the order in which he collected the students' responses, so the sample cannot be random  In this investigation of household size, each household represents a case  Charlie incorrectly sampled individuals instead of households  Both (a) and (c) are correct  Answers (a), (b), and (c) are all correct  15  Which of the following are reasons that a sampling technique may not be scientific  Choose all that apply  Self Selected Sample The sample statistic is not exactly equal to the population parameter The sample size is too small The wording of survey question influences the response The sample is not representative of the population 16  Determine whether the following is an example of a sampling error or a non sampling error  A researcher studied brother sister pairs to see if there is a difference in IQ scores  Although the researcher made no mistakes in collecting the data, the findings showed that there was a difference when in reality there is no difference in IQ based on gender  Non Sampling Error Sampling Error 17  Which of the following are reasons that a sampling technique may not be scientific  Choose all that apply  The researcher was not able to survey every individual from the population People who were asked refused to answer The graphs are drawn in a way to mislead the reader Two factors cannot be separated to determine which is the one that is responsible for the outcome The funders of the project are partial to the results Trying to conclude that there is a cause and effect relationship when something else causes both 18  Would the following method produce a random sample  Separating all books by subjects such that there are an equal number of books on each subject, and selecting 4 from each subject grouping Yes No 19  If the sample size is much smaller than the population size, say 20 times smaller, then random sampling with replacement and random sampling without replacement are nearly equivalent  True False 20  Data was collected for 300 fish from the North Atlantic  The length of the fish (in mm) is summarized in the GFDT below  Lengths (mm) Frequency 140   149 1 150   159 16 160   169 71 170   179 108 180   189 83 190   199 18 200   209 3 What is the lower class boundary for the first class  class boundary   21  240 people are asked how many siblings they have    of Siblings Frequency Relative Frequency Cumulative Frequency 0 47 0 1958 47 1 55 2 0 1583 140 3 56 0 2333 196 4 44 0 1833 240 a  Complete the table (Use 4 decimal places when applicable) b  What percent of the people have exactly zero siblings    22  The following data represents the age of 30 lottery winners  22 25 28 32 35 39 40 43 44 45 47 47 50 54 54 54 55 55 57 58 60 61 62 67 68 68 68 69 70 87 Complete the frequency distribution for the data  Age Frequency 20 29 30 39 40 49 50 59 60 69 70 79 80 89 23  In a student survey, forty one part time students were asked how many courses they were taking this term  The (incomplete) results are shown below  Please round your answer to 4 decimal places for the Relative Frequency if possible    of Courses Frequency Relative Frequency Cumulative Frequency 1 13 0 3171 13 2 0 2927 25 3 16 What percent of students take exactly three courses           24  Home Sales Prices (hundred thousands) (ten thousands) 0 667778999 1 02447778889999 2 0011234445667889 3 00011225 The stem and leaf plot above shows house sale prices over the last week in Tacoma  What was the most expensive house sold  Give your answer in dollars $         25  Data was collected for a sample of organic snacks  The amount of sugar  in mg  in each snack is summarized in the histogram below  Which statement best describes the meaning of one of the bars in the histogram  I2 It  121'   340 1150  330 249i  221'  2419 215i  amount ofsugar  mg   3   0 15B snacks have 2 mg of sugar  O 1513 snacks have between 1443 and 1450' mg of sugar   3' The largest number of snacks have 13 mg of sugar 0 2 snacks have about 15D mg of sugar

Accepted Answer

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Age	Frequency
20-29
30-39
40-49
50-59
60-69
70-79
80-89

# of Courses	Frequency	Relative Frequency	Cumulative Frequency
1	13	0.3171	13
2		0.2927	25
3	16

Question

2. . Is this value from a discrete or continuous data set. The average weight of newborn babies in ounces A. Qualitative (Categorical) B. Quantitative

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Lengths (mm)	Frequency
140 - 149	1
150 - 159	16
160 - 169	71
170 - 179	108
180 - 189	83
190 - 199	18
200 - 209	3

22	25	28	32	35	39
40	43	44	45	47	47
50	54	54	54	55	55
57	58	60	61	62	67
68	68	68	69	70	87

22	25	28	32	35	39
40	43	44	45	47	47
50	54	54	54	55	55
57	58	60	61	62	67
68	68	68	69	70	87

22	25	28	32	35	39
40	43	44	45	47	47
50	54	54	54	55	55
57	58	60	61	62	67
68	68	68	69	70	87