Unit 1 Assignment Started: Aug 24 at 5:18pm Quiz Instructions Please choose one response for each question. There are 30 questions, and there is no time limit. There are no retakes. You will be able to see the correct answers, but these will only be available until a week after the quiz (assignment) is due. Question 1 1 pts Ski resorts are interested in the mean age that children take their rst ski and snowboard lessons. They need this information to plan their ski classes optimally. Which of the following is the population of the study? the population mean age of children who take their rst snowboard lesson values for X, such as 3, 7, and so on the sample mean age of children who take their rst snowboard lesson a group of these children X = the age of one child who takes his or her rst ski or snowboard lesson all children who take ski or snowboard lessons Question 2 1 pts Ski resorts are interested in the mean age that children take their rst ski and snowboard lessons. They need this information to plan their ski classes optimally. What is the sample of this study? the sample mean age of children who take their rst snowboard lesson all children who take ski or snowboard lessons the population mean age of children who take their rst snowboard lesson a group of these children values for X, such as 3, 7, and so on X = the age of one child who takes his or her rst ski or snowboard lesson Question 3 1 pts Ski resorts are interested in the mean age that children take their rst ski and snowboard lessons. They need this information to plan their ski classes optimally. Which of the following is a statistic of interest in this study? values for X, such as 3, 7, and so on the sample mean age of children who take their rst snowboard lesson the population mean age of children who take their rst snowboard lesson X = the age of one child who takes his or her rst ski or snowboard lesson all children who take ski or snowboard lessons a group of these children Question 4 1 pts Ski resorts are interested in the mean age that children take their rst ski and snowboard lessons. They need this information to plan their ski classes optimally. Which of the following is a variable in this study? values for X, such as 3, 7, and so on the sample mean age of children who take their rst snowboard lesson all children who take ski or snowboard lessons the population mean age of children who take their rst snowboard lesson a group of these children X = the age of one child who takes his or her rst ski or snowboard lesson Question 5 1 pts Ski resorts are interested in the mean age that children take their rst ski and snowboard lessons. They need this information to plan their ski classes optimally. Which of the following describes data for this study? all children who take ski or snowboard lessons a group of these children X = the age of one child who takes his or her rst ski or snowboard lesson values for X, such as 3, 7, and so on the population mean age of children who take their rst snowboard lesson the sample mean age of children who take their rst snowboard lesson Question 6 1 pts Ski resorts are interested in the mean age that children take their rst ski and snowboard lessons. They need this information to plan their ski classes optimally. \"Number of children\" is an example of ________ data. discrete discrete and continuous continuous Question 7 1 pts \"Percent of body fat\" is an example of _________ data. continuous discrete discrete and continuous Question 8 1 pts \"Marital status\" is an example of _________ data. continuous discrete discrete and continuous Question 9 1 pts Ms. Smith wants to nd out why students take introductory statistics at the University of Utah this semester. She nds out that there are 20 introductory statistics classes offered this semester at the U. with a total of 4,000 students enrolled. She wants to select 100 students for her sample. Suppose she obtains the list of these 4,000 students, assign a number of 1-4,000 to each of them, and use a computer program to randomly select 100 numbers between 1-4,000. What sampling method is she using? stratied cluster convenience simple random systematic Question 10 1 pts Ms. Smith wants to nd out why students take introductory statistics at the University of Utah this semester. She nds out that there are 20 introductory statistics classes offered this semester at the U. with a total of 4,000 students enrolled. She wants to select 100 students for her sample. Suppose she divides students into four groups: freshman, sophomore, junior, and senior, and then randomly select 25 from each group to be in her sample. What method of sampling is she using? simple random stratied convenience systematic cluster Question 11 1 pts Ms. Smith wants to nd out why students take introductory statistics at the University of Utah this semester. She nds out that there are 20 introductory statistics classes offered this semester at the U. with a total of 4,000 students enrolled. She wants to select 100 students for her sample. Suppose she herself is enrolled in FCS3210 so she randomly picks 100 students from FCS3210 for her sample. What method of sampling is she using? systematic simple random convenience cluster stratied Question 12 1 pts Ms. Smith wants to nd out why students take introductory statistics at the University of Utah this semester. She nds out that there are 20 introductory statistics classes offered this semester at the U. with a total of 4,000 students enrolled. She wants to select 100 students for her sample. Suppose she randomly picks 5 introductory classes out of the 20, and then randomly picks 20 students out of each of these 5 classes. What method of sampling is she using? convenience systematic cluster stratied simple random Question 13 1 pts Fifty part-time students (taking three courses or less) were asked how many courses they were taking this term. The (incomplete) results are shown below: # of Courses Frequency Relative Frequency Cumulative Relative Frequency 1 0.6 30 2 15 3 How many students are taking 3 courses? 25-30 9-15 16-24 1-8 0 Question 14 1 pts Fifty part-time students (taking three courses or less) were asked how many courses they were taking this term. The (incomplete) results are shown below: # of Courses Frequency Relative Frequency Cumulative Relative Frequency 1 30 0.6 2 15 3 What is the relative frequency for students taking 2 courses? between 0.25 and 0.39 between 0.40 and 0.54 more than 0.54 between 0.10 and 0.24 less than 0.1 Question 15 1 pts Fifty part-time students (taking three courses or less) were asked how many courses they were taking this term. The (incomplete) results are shown below: # of Courses Frequency Relative Frequency Cumulative Relative Frequency 1 30 0.6 2 15 3 What is the relative frequency for students taking 3 courses? more than 0.35 between 0.05 and 0.15 between 0.151 and 0.25 between 0.251 and 0.35 less than 0.05 Question 16 1 pts Fifty part-time students (taking three courses or less) were asked how many courses they were taking this term. The (incomplete) results are shown below: # of Courses Frequency Relative Frequency Cumulative Relative Frequency 1 30 0.6 2 15 3 What is the cumulative frequency for students taking 1 course? between 0.26 and 0.40 between 0.41 and 0.55 between 0.10 and 0.25 more than 0.56 less than 0.10 Question 17 1 pts Fifty part-time students (taking three courses or less) were asked how many courses they were taking this term. The (incomplete) results are shown below: # of Courses Frequency Relative Frequency Cumulative Relative Frequency 1 30 0.6 2 15 3 What is the cumulative frequency for students taking 1 or 2 courses? between 0.75 and 0.85 more than 1.05 between 0.86 and 0.95 less than 0.75 between 0.96 and 1.05 Question 18 1 pts Fifty part-time students (taking three courses or less) were asked how many courses they were taking this term. The (incomplete) results are shown below: # of Courses Frequency Relative Frequency Cumulative Relative Frequency 1 30 0.6 2 15 3 What is the cumulative frequency for students taking 1, 2, or 3 courses? more than 1.05 less than 0.75 between 0.96 and 1.05 between 0.86 and 0.95 between 0.75 and 0.85 Question 19 1 pts Fifty part-time students (taking three courses or less) were asked how many courses they were taking this term. The (incomplete) results are shown below: # of Courses Frequency Relative Frequency Cumulative Relative Frequency 1 30 0.6 2 15 3 What is the cumulative frequency for students taking 1, 2, or 3 courses? between 20.01% and 25% between 10.01% and 15% between 15.01% and 20% more than 25% less than 10% Question 20 1 pts Fifty part-time students (taking three courses or less) were asked how many courses they were taking this term. The (incomplete) results are shown below: # of Courses Frequency Relative Frequency Cumulative Relative Frequency 1 30 0.6 2 15 3 What percent of students take 1 or 2 courses? more than 95% between 85.01% and 95% less than 65% between 75.01% and 85% between 65.01% and 75% Question 21 1 pts Here are some data: -1, 3, 0, 3, 5, -3, 2, 0, 4, 1, 6, 5, 6, 7, 3. What is the mean? between 2.51 and 3.50 between 0.51 and 1.50 between 1.51 and 2.50 less than 0.5 more than 3.50 Question 22 1 pts How does sleep deprivation affect your ability to drive? A recent study measured the effects on 19 professional drivers. Each driver participated in two experimental sessions: one after normal sleep and one after 27 hours of total sleep deprivation. The treatments were assigned in random order. In each session, performance was measured on a variety of tasks including a driving simulation. \"Amount of sleep\" is ________. a response/dependent variable an explanatory/independent variable the treatment a lurking variable Question 23 1 pts How does sleep deprivation affect your ability to drive? A recent study measured the effects on 19 professional drivers. Each driver participated in two experimental sessions: one after normal sleep and one after 27 hours of total sleep deprivation. The treatments were assigned in random order. In each session, performance was measured on a variety of tasks including a driving simulation. \"Performance measured in assigned tasks\" is ___________. a lurking variable an explanatory/independent variable a response/dependent variable the treatment Question 24 1 pts How does sleep deprivation affect your ability to drive? A recent study measured the effects on 19 professional drivers. Each driver participated in two experimental sessions: one after normal sleep and one after 27 hours of total sleep deprivation. The treatments were assigned in random order. In each session, performance was measured on a variety of tasks including a driving simulation. In the experiment, researchers evaluating subject's performance must not know which treatment is being applied at the time. Such a design is referred to as _________. treatment blinding experimental units random assignment placebo Question 25 1 pts How does sleep deprivation affect your ability to drive? A recent study measured the effects on 19 professional drivers. Each driver participated in two experimental sessions: one after normal sleep and one after 27 hours of total sleep deprivation. The treatments were assigned in random order. In each session, performance was measured on a variety of tasks including a driving simulation. In the experiment, treatments were assigned in random order, which eliminated the effect of any \"learning\" that may take place during the rst experimental session. Such a design is referred to as _________________. treatment placebo blinding random assignment experimental units Question 26 1 pts A survey poses the following question: \"Are you a smoker? Possible answers are either yes or no. What level of measurement are the resulting data? ordinal nominal ratio interval Question 27 A survey poses the following question: \"If you are a smoker, how many cigarettes did you have today?\" What level of measurement are the resulting data? interval ratio 1 pts ordinal nominal Question 28 1 pts A survey poses this question about your friendship circle: ________ I have many close friends ________ I have a few close friends ________ I have one close friend ________ I don't have any close friends interval nominal ratio ordinal Question 29 A survey asks you to identify your race/ethnicity using the following questions: ________ White ________ African American ________ Latino ________ Asian ________ Native American or American Indian ________ Other interval nominal ordinal 1 pts ratio Question 30 1 pts A survey asks a group of investment advisors to indicate the average return on investment they obtain for their customers. Here are some of their answers: -50%, -18%, 0%, 2%, 50%, 300%. nominal ratio interval ordinal Quiz saved at 5:18pm Submit Quiz