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Solve the problem. 1) For the study described below, identify the sample. A bank manager wants to know the average amount of time customers of his bank have to wait in line. 300 custo were polled and asked their average wait time at the bank. 27 of the 300 were extremely dissatisfied with the an time they had had to wait in line in recent months. A) The 27 people who were dissatisfied. B) The 300 customers polled C) All customers of the bank D) The customers who were waiting in line at the bank the day of the poll 2) For the study described below, identify the population. A manufacturer of light bulbs wants to determine the average lifetime of its 75-watt light bulbs. Among 120 randomly selected 75-watt light bulbs, the average lifetime was 1007 hours. A) All 75-watt light bulbs manufactured by the company B) The 120 randomly selected 75-watt light bulbs C) All 75-watt light bulbs D) The average lifetime of all 75-watt light bulbs manufactured by the company 3) For the study described below, identify the population parameter. A researcher is interested in the level of stress among emergency-room nurses in the U.S. 275 emergency-room nurses were interviewed to determine their level of stress. Each nurse was assigned a stress rating based on his or her answers to a number of questions. The average stress rating for the 275 nurses was determined. A) The average stress rating for all emergency-room nurses in the world B The average stress rating for all emergency-room nurses in the U.S. C) All emergency-room nurses in the U.S. D) The average stress rating for the 275 emergency-room nurses interviewed Identify which of these types of sampling is used: random, stratified, systematic, or convenience. 4) 49 students are selected at random from the Sophomore class, 39 from the Junior class, and 48 from the Senior classes. A Stratified B) Random C) Systematic D) Convenience 5) A sample consists of every 20th student who leaves the library. A) Convenience B) Stratified Systematic D) Random 6) To avoid working late, a quality control analyst simply inspects the first 100 items produced in a day. A Convenience B) Stratified C) Random D) Systematic In order to answer the given question, which of the following types of study would be the most appropriate? an experiment without blinding, an experiment with single blinding, an experiment with double blinding, an observati study, or a case-control study? 7) Does smoking elevate blood pressure? A) Experiment with double blinding B) Experiment without blinding ) Case-control study D) Observational study E) Experiment with single blindingProvide an appropriate response. 18) Four different distributions are represented by the four boxplots below. D I smallest median - skewed to the left O goutest variation 5 4 5 6 7 8 9 10 1 Which distribution has the smallest median? Which has the greatest variation? Which is skewed to the left? Construct a boxplot as requested. 19) The test scores of 32 students are listed below. Construct a boxplot for the data set. 32 37 41 44 46 48 53 55 57 57 59 63 65 66 68 69 70 71 74 74 75 77 78 79 81 82 83 86 89 92 95 99 A) B 32 56 69.5 79 99 32 69.5 80 99 D 32 56 69.5 80 95 32 56 69.5 80 99 Find the standard deviation for the given data. Round your answer to one more decimal place than the original data 20) 3, 5, 6, 6, 9, 1 (A) 2.8 B) 5.4 C) 2.5 D) 7.6 State whether the distribution appears to be (roughly) normal. 21) A) Not normal B Normal34) True or False? A zero slope means a horizontal line. A True B) False octave higher. 35) Starting with a tone having a frequency of 122 cycles per second, find the frequency of the tone that is one A) 14,884 cps B) 244 cps C) 366 cps D) 488 ops 36) In the algebraic equation of a line, the y-intercept is denoted by the letter A) b B) y C ) m 37) Starting with a tone having a frequency of 200 cycles per second, find the frequency of the tone that is three octaves higher. A) 800 cps B) 40,000 cps 1600 cps D) 600 cps 38) What is a golden spiral? A) A curve connecting corners of divided golden rectangles B) A circle with radius 5 C) A golden rectangle inside of a circle D) A circle drawn inside a golden rectangle 39) The following graph represents a function. Identify the independent and dependent variables and describe the c and range. 96- N Average Age of Death 48- 1980 1986 1992 1998 2004 Year A) The independent variable is time, measured in years, and the dependent variable is age. The domain is the years between 1980 and 2004. The range is the ages between 0 and 81. B) The independent variable is age and the dependent variable is time, measured in years. The domain is the ages between 0 and 81. The range is the years between 1980 and 2004. C) The independent variable is age and the dependent variable is time, measured in years. The domain is the years between 1980 and 2004. The range is the ages between 0 and 81. D) The independent variable is time, measured in years, and the dependent variable is age. The domain is the ages between 0 and 81. The range is the years between 1980 and 2004.8) What percentage of the population reads a newspaper on a regular basis? A Observational study B) Experiment with double blinding C) Experiment without blinding D) Experiment with single blinding E) Case-control study A sample statistic and margin of error are given. Find the confidence interval likely to contain the population parameter of interest and answer the question. 9) A poll conducted the day before the student-body presidential election at a midwestern university showed that 53.9 percent favored Mario, the rest favoring Yin Ling. The margin of error was 4.2 percentage points. Should Yin Ling have conceded the election? A) 51.8% to 56%; yes B 49.7% to 58.1%; no C) 53.9% to 58.1%; yes D) 49.7% to 53.9%; no Identify the variable as either qualitative or quantitative. 10) The population of a town A) Quantitative B) Qualitative Use the indicated bin size to construct a frequency table for the set of data. Include columns for relative frequency and cumulative frequency. 11) Kevin asked some of his friends how many hours they had studied for the test. The times are shown below: 475 hours of stay Comulilive 6 5 6 3 8 6 5 7 6 5 7 5 8 5 7 8 3 3 - 4 3 24 5- 6 13 Use 2-point bins (3-4, 5-6, etc) 13 7- 8 24 Construct the specified histogram. 9 - 10 12) In a survey, 20 voters were asked their age. The results are summarized in the frequency table below. Construct histogram . Age Number of voters 20-29 15 30-39 40-49 6 50-59 O 60-69 4 2 20 30 40 50 60 70Use the graph to answer the question. 13) The bar graph below shows the relative frequencies of the different blood types. Write a sentence describing wh revealed by the graph. Relative Frequency 0.40 0.30 0.20 0.10 0.00 0 A B AB Blood Type Identify the distribution as symmetric, left-skewed, or right-skewed. 14) The amounts of tax paid by U.S. residents A) Symmetric B Right-skewed C) Left-skewed 15) Weights of new-born babies A) Symmetric B) Right-skewed C) Left-skewed Find the range for the given data. 16) Rich Borne is currently taking Chemistry 101. On the five laboratory assignments for the quarter, he got the follo scores. 28 31 15 48 57 A) 15 B) 3 C 42 D) 57 Obtain the five-number summary for the given data. 17) The test scores of 15 students are listed below. 42 46 48 53 59 63 66 68 74 77 85 87 90 94 95 A) 42, 53, 68, 87, 95 B) 42, 51.75, 68, 85.5, 95 C) 42, 51.75, 71.0, 85.5, 95 D) 42, 53, 71.0, 87, 95we whether you would expect the data set to be normally distributed. A) Normal 22) The amount of coffee which a filling machine puts into "4 ounce jars B) Not normal 23) The amount of property taxes paid by homeowners A) Normal B) Not normal 24) Resting heart rates for adults A) Normal B) Not normal Use the 68-95-99.7 rule to solve the problem. 25) The time it take Claudia to drive to work is normally distributed with a mean of 49 minutes and a standard A) 0.3% deviation of 8 minutes. What percentage of the time will it take her less than 73 minutes to drive to work? B) 99.7% C) 99.85% D) 0.15% Solve the problem. Round your answer to two decimal places. 26) Scores on a test are normally distributed with a mean of 73 and a standard deviation of 11. What is the standard score for an exam score of 87 ? A) 1.27 B) 1.04 C) -1.04 D) 0.79 27) Scores on a test are normally distributed with a mean of 60 and a standard deviation of 14. What is the exam score corresponding to a standard score of 1.64? A) 60.12 B) 37.04 C) 82.96 D) None of the above For the given data value, find the standard score and the percentile. 28) A data value 0.6 standard deviations above the mean. A z = 0.6; percentile = 72.57 B) z=0.6; percentile = 2.5 C) z = 0.06; percentile = 51.99 D) z=-0.6; percentile = 27.43 Use the 68-95-99.7 rule to solve the problem. 29) At one college, GPA's are normally distributed with a mean of 2.8 and a standard deviation of 0.4. What percentage of students at the college have a GPA between 2.4 and 3.2? A) 95% B) 68% C) 84% D) 99.7% Solve the problem. 30) Suppose that the mean salary in a particular profession is $45,000 with a standard deviation of $2,000. To what percentile does a salary of $48,000 correspond? A) 93rd B) 41st C) 91st D) 43rd Find the standard score for the given data value. 31) A data value in the 58th percentile. A) z= -2.5 B Z = 0.2 C) z = 72.57 D) Z= -1.6 Provide an appropriate response. 32) What is the most compact mathematical representation of a function? A Equation B) Graph C) Domain D) Data table 33) True or False? The slope is defined as the amount that the graph runs vertically for a given distance that it rises horizontally. A) True B) False