Week 1 Test - Attempt A PDF

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Week 1 Test Return to Assessment List

Part 1 of 5 - Section: Data & Sampling

5.0/ 5.0 Points

Question 1 of 20 1.0/ 1.0 Points What kind of data is "the colors of the cars around the gym" in the scenario? A study was done to determine the age, the number of times per week, and the duration (amount of time) of residents using a local gym in San Antonio, Texas. The first car in the parking lot was selected randomly, and then the resident of every eighth car in the lot around the gym was interviewed.



A. Quantitative Discrete 

B. Quantitative Continuous 

C. Qualitative

Answer Key:C Question 2 of 20 1.0/ 1.0 Points The first 65 people who walk into a sports bar are polled on their television preferences. What type of sampling was used?



A. Convenience 

B. Systematic 

C. Stratified 

D. Cluster

Answer Key:A Question 3 of 20

1.0/ 1.0 Points What is the sampling method used in the following scenario? The marketing manager for TJ Maxx department stores wants information about the ages of its customers. Over the next four weeks, at each store location, 250 randomly selected customers are given questionnaires to fill out asking for information about age, as well as about other variables of interest.



A. systematic 

B. simple random 

C. convenience 

D. cluster 

E. stratified

Answer Key:B Question 4 of 20

1.0/ 1.0 Points Duration (amount of time) is what type of data in the scenario? A study was done to determine the age, the number of times per week, and the duration (amount of time) of residents using a local gym in San Antonio, Texas. The first car in the parking lot wa s selected randomly, and then the resident of every eighth car in the lot around the gym was interviewed.



A. Qualitative 

B. Quantitative Continuous 

C. Quantitative Disrete

Answer Key:B Question 5 of 20 1.0/ 1.0 Points What was the sampling method that was used in the scenario? A study was done to determine the age, the number of times per week, and the duration (amount of time) of residents using a local gym in San Antonio, Texas. The first car in the parking lot was selected randomly, and then the resident of every eighth car in the lot around the gym was interviewed.



A. simple random 

B. cluster 

C. systematic 

D. stratified

Answer Key:C Part 2 of 5 - Section: Statistics, Probability and Key Terms

5.0/ 5.0 Points

Question 6 of 20 1.0/ 1.0 Points A Priest is interested in the proportion of couples who stay married after he marries them. Identify the sample:



A. all the couples the priest marriages



B. a subgroup of couples the priest marriages 

C. the proportion of the sample of the priest's couples who stay married 

D. the proportion of all couples who stay married

Answer Key:B Question 7 of 20 1.0/ 1.0 Points An APU instructor is interested in the mean number of days an APU statistic students are absent from class during a quarter. The instructor’s sample produces a mean number of days absent of 5 days. This value is an example of a:



A. parameter 

B. statistic 

C. data 

D. variable

Answer Key:B Question 8 of 20 1.0/ 1.0 Points A local polling chapter is interested in the mean age of people who voted in the last election. They want to use this information to help get more people of all ages out to vote. Identify the sample.



A. the population mean age of people who voted 

B. a subgroup of these voters 

C. all people who have voted 

D. the sample mean age of people who voted in the last election

Answer Key:B Question 9 of 20 1.0/ 1.0 Points An APU instructor is interested in the mean number of days an APU statistic students are absent from class during a quarter. X = number of days an APU statistic students are absent from class during a quarter. In this case, X is an example of :



A. data 

B. a statistic 

C. population 

D. a variable

Answer Key:D

Question 10 of 20 1.0/ 1.0 Points A local Polling chapter is interested in the proportion of people who voted in the last election. Identify the statistic.



A. the proportion of the sample who voted in the last election 

B. all people (maybe in a certain geographic area, such as everyone in the state) 

C. a group of the people 

D. the proportion of all people who voted in the last election

Answer Key:A Part 3 of 5 - Section: Frequency, Frequency Tables and Measurement

Question 11 of 20 1.0/ 1.0 Points

2.0/ 2.0 Points

Use the following information to answer the question: The (incomplete) table below contains data on hurricanes that have made direct hits on the U.S. Between 1851 and 2004. A hurricane is given a strength category rating based on the minimum wind speed generated by the storm. Frequency of Hurricane Direct Hits Category Number of Direct Hits Relative FrequencyCumulative Frequency 1

115

2

107

3

65

4

15

5

4

0.3758

0.3758 0.7255

0.0490 1.0000

Total=306 What is the relative frequency of direct hits that were category 3 hurricanes?



A. Not enough information to calculate 

B. 0.0490 

C. 0.2124 

D. 0.0131

Answer Key:C Feedback:Good job! Question 12 of 20 1.0/ 1.0 Points Forbes magazine published data on the best small firms in 2012. These were firms which had been publicly traded for at least a year, have a stock price of at least $5 per share, and have reported annual revenue between $5 million and $1 billion. The table below shows the ages of the chief executive officers for the first 73 ranked firms. Age

FrequencyRelative FrequencyCumulative Relative Frequency

40-44

4

45-49

3

50-54

15

55-59

20

60-64

21

65-69

8

70-74

2

Answer the following questions: What percentage of CEOs are 59 years or younger? Round your answer to the nearest tenth. 57.5 % What is the relative frequency of ages 65 to 69? Round your answer to 4 decimal places 0.1096 What is the cumulative frequency for CEOs over 55 years in age? Round to a whole number. Do not include any decimals. 51

Answer Key:57.5, 0.1096| .1096, 51 Feedback:Good job! Part 4 of 5 - Section: Variation and Rounding Off

4.0/ 5.0 Points

Question 13 of 20 1.0/ 1.0 Points Click to see additional instructions

Round the fraction

to 4 decimal places. Make sure you include the 0 in front of the decimal.

0.4286

Answer Key:0.4286 Question 14 of 20 0.0/ 1.0 Points At the premiere of a new movie in the US, a poll of the movie goers opinions were asked if they liked the movie or not. As they were walking out of the movie, they had the opportunity to take

the survey and submit their results at a ballot box. A large sample size was represented, and this poll was repeated again one week later with similar results at the movie premiere in the UK. When working with this data, which of the following statements best applies?



A. The surveys are biased because people chose to respond or not. 

B. Because of the large sample size, the results are most accurate of all members of the community. 

C. The same sampling methods were used for both polls, demonstrating reliability. 

D. This is a Simple Random Sample

Answer Key:A Question 15 of 20 1.0/ 1.0 Points Click to see additional instructions

Round the number 1571.047619 to the nearest hundredth. 1571.05

Answer Key:1571.05 Question 16 of 20 1.0/ 1.0 Points Education and graduation rate statistics for 50 US states were collected from local high schools . One analysis of this data found a strong connection between education and income indicating that higher levels of education in a community correspond to lower income. Which of the potential problems with samples discussed below could explain this connection?



A. Confounding

Feedback: Confounding: There are many factors that define a community other than education level and crime rate. Communities with high crime rates and high education levels may have other lurking variables that distinguish them from communities with lower crime rates and lower education levels. Because we cannot isolate these variables of interest, we cannot draw valid conclusions about the connection between education and crime. Possible lurking variables include police expenditures, unemployment levels, region, average age, and size. 

B. Misleading use of data 

C. Self-funded or self-interest study 

D. Non-response or refusal of subject to participate

Answer Key:A Question 17 of 20 1.0/ 1.0 Points Click to see additional instructions

Round the fraction

to 4 decimal places.

7.8837

Answer Key:7.8837 Part 5 of 5 - Section: Measurement Scale Questions

Question 18 of 20

3.0/ 3.0 Points

1.0/ 1.0 Points What measurement scale is used in the following example? IQ Scores: 75, 90, 115, 130, 145



A. Ordinal 

B. Nominal 

C. Interval 

D. Ratio

Answer Key:C Question 19 of 20 1.0/ 1.0 Points What measurement scale is used in the following example? The colors of pencils in a Crayola Colored Pencil 50 count box



A. Nominal



B. Interval 

C. Ordinal 

D. Ratio

Answer Key:A Question 20 of 20 1.0/ 1.0 Points What measurement scale is used in the following example? A satisfaction survey of a local restaurant: 1=Very Satisfied 2= Satisfied 3= Somewhat Satisfied 4=Not Satisfied



A. Ordinal 

B. Ratio 

C. Nominal



D. Interval

Answer Key:A...