Failing grade for gabriella owens since she doesnt believe me...business statistics multiple choice

Student ID: 22144192

Exam: 350362RR - Data: Description, Collection, and Sampling

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Questions 1 to 20: Select the best answer to each question. Note that a question and its answers may be split across a page break, so be sure that you have seen the entire question and all the answers before choosing an answer.

1. Which of the following statements about interpreting standard deviation is true? A. Chebyshev's Rule can't be applied unless the frequency distribution is mound-shaped and symmetric. The Empirical Rule can be applied to any data set, regardless of the shape of its frequency distribution.

B. The Empirical Rule can't be applied unless the frequency distribution is mound-shaped and symmetric. Chebyshev's Rule can be applied to any data set, regardless of the shape of its frequency distribution.

C. Neither the Empirical Rule nor Chebyshev's Rule can be applied to data unless the frequency distribution is mound-shaped and symmetrical.

D. Neither Chebyshev's Rule nor the Empirical Rule require any assumptions about the frequency distribution.

2. If a teacher wants to see if students in college classes most commonly receive B as a grade, she'll consider the _______ of the data. A. proportion

B. mode

C. variance

D. mean

3. In a sample with mean of 12 and standard deviation of 3.5, a data point at 16.8 would have what sample z-score? A. 1.58

B. 4.8

C. 1.4

D. 1.37

4. Your company is trying to assess the effectiveness of its management team. It collects data on every employee's time with the company, position, and who their direct supervisor is. Which of these pieces of data is quantitative? A. Direct supervisor

B. Position

C. Time with the company

D. No quantitative data is included in this experiment

5. The following dataset represents a student's GPA over six semesters: 3.2, 2.5, 2.1, 3.7, 2.8, 2.0

What's the student's median GPA? A. 2.72

C. 2.0

E. 2.65

F. 15

6. When obtaining data by _______ it's most important to inquire about the purposes of the original experimenter. A. reading a published source

B. performing a designed experiment

C. conducting a survey

D. collecting data observationally

7. Which type of plot takes quantitative data and forms classes out of it, thus turning it into qualitative data? A. Histogram

B. Dot plot

C. Stem and leaf plot

D. Pie chart

8. You're trying to find out how many students who graduate with accounting degrees from large universities are employed at graduation. You design an experiment where you collect information on several variables from recent graduates from the University of Florida accounting program. Specifically, you survey 198 alumni about their employment status, age at graduation, gender, and grade point average. Which of the data you collected is qualitative? A. Gender and employment status

B. Employment status and gender

C. Gender and grade point average

D. Age at graduation and grade point average

9. What's the mean of the following data? 18, 10, 15, 13, 17, 15, 12, 15, 18, 16, 11 A. 14.55

B. 18

C. 14

D. 15

10. What percentile is the upper quartile? A. 25%

B. 100%

C. 50%

D. 75%

11. Use the following data sample to answer the question. 4, 14, 6, 9, 21, 3, 7, 10 What's the standard deviation of this data sample? A. 243.5

B. 5.90

C. 34.79

D. 4.33

12. Robotics manufacturers can design mobility features in one of several ways. Robots can have legs, wheels, both legs and wheels, or no legs or wheels. Using a random sample of 106 robots, researchers found that 63 had legs only, 20 had wheels only, 8 had both legs and wheels, and 15 had no legs or wheels. What's the relative frequency of robots with no legs or wheels? A. .5

B. .075

C. .142

D. .189

13. Which of the following involves inferential statistics as opposed to descriptive statistics? A. The city business office reported 35 building permits for new single-family housing units.

B. A local cable system, using a sample of 500 subscribers, estimates that 40 percent of its subscribers watch a premium channel at least once per day.

C. The Alcohol, Tobacco and Firearms Department reported that Houston had 1,791 registered gun dealers in 1997.

D. A class of 50 statistics students earned an average grade of 73.5.

14. Ten students were sampled at random from a student population. Each was asked how many courses he or she was planning on studying in the upcoming year. The following is a list of the reported data values: 1, 2, 2, 3, 4, 5, 5, 5, 5, 6 What's the standard deviation for the data values? A. 2.56

B. 1.687

C. 1.6

D. 2.84

15. Describe how the mean compares to the median when a distribution is skewed to the right. A. Mean > median

B. Mean < median

C. Mean = median

D. Both mean and median = 0

16. What is a quartile?

End of exam

A. A descriptive statistics printout.

B. Percentiles that divide a data set into four categories that contain 25% of the measurements for each of the categories.

C. Descriptive measures of data.

D. A technique used for estimating the length of time it takes to produce a product.

17. If there are an odd number of data values in a set, the median will be the A. average of the two end values.

B. value that appears in the center.

C. average of all of the values divided by the number of values in the set.

D. value that appears the greatest number of times.

18. Consumer product manufacturers commonly include customer satisfaction surveys on product warranty cards that are sent back to the company. An outdoors company redesigned a popular camping tent, and it wants to know whether customers like the newer version better than the older one. So, they include in their warranty registration card a survey that askes two questions: first, whether the customer owned the older version of the tent and, second, whether they liked the newer version better. What variable was measured by this experiment? A. Whether customers who never owned the original design like the new tent design

B. Camping tent design technical superiority

C. Camping tent profitability

D. Consumer satisfaction with camping tent design

19. A population is a collection of _______ about which you'll measure certain characteristics or properties, called variables. A. traits.

B. sample values.

C. experimental units.

D. data.

20. Use the following data sample to answer the question. 4, 14, 6, 9, 21, 3, 7, 10 What's the mean of this data sample? A. 9.25

B. 7

C. 12

D. 8