Business statistics multiple choice

Student ID: 22144192

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

When you have completed your exam and reviewed your answers, click Submit Exam. Answers will not be recorded until you hit Submit Exam. If you need to exit before completing the exam, click Cancel Exam.

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. A study was conducted of the 12-month earnings per share for two airline companies, with the result shown here:

Based on the data, which of the following statements is correct? A. The mode of the data is $1.52.

B. The median of the data is $0.99.

C. The standard deviation of the data is $2.21.

D. The mean of the data is $1.10.

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

B. 15

C. 14

D. 18

3. A particular sample contains 50 data values. According to Chebyshev's theorem, which of the following is the maximum number of values you would expect to fall within 3.0 standard deviations of the mean? A. 20

B. 45

C. 35

D. 15

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

B. data.

C. sample values.

D. traits.

5. Economists are studying your local housing market to see whether mortgage approval rates impact home prices. They collect data on mortgage approval rates in your area and compare them with local housing prices. In this experiment, what are the variables measured? A. Mortgage approval rates and housing prices

B. Housing prices and income

C. Mortgage approval rates and income

D. Mortgage approval rates and discrimination

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

B. reading a published source

C. performing a designed experiment

D. collecting data observationally

7. Use the following data sample to answer the question. 4, 14, 6, 9, 21, 3, 7, 10 What's the median of this data sample? A. 8

B. 7

C. 9.25

D. 12

8. To answer the question, refer to the following list of raw data. 63, 71, 72, 77, 77, 78, 86, 77, 88, 88 What's the mode for the data? A. 77.5

B. 87.5

C. 77

D. 77.7

9. 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. Gender and grade point average

C. Age at graduation and grade point average

D. Employment status and gender

10. What's an estimate, prediction, or generalization about a population based on information contained in a sample called? A. samples

B. characters

C. data

D. statistical inference

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

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

12. Use the following data sample to answer the question. 4, 14, 6, 9, 21, 3, 7, 10 What's the variance of this data sample? A. 34.79

B. 4.33

C. 5.90

D. 243.5

13. Bridges in the United States are regularly inspected by federal and state regulatory agencies. Data from these inspections is compiled into a computer database, which includes information on the length of each bridge, how many travel lanes it has, whether it's a toll bridge, how many cars travel over the bridge each day, the and the condition of the bridge (good, fair, or poor). Which of these data are qualitative? A. The length of each bridge, how many travel lanes it has, how many cars travel over the bridge each day.

B. The length of each bridge, how many travel lanes it has, and whether the policies in place are sufficient to ensure the bridge is safe.

C. How many travel lanes it has, how many cars travel over the bridge each day, and whether the bridge is a toll bridge.

D. Whether it's a toll bridge and the condition of the bridge (good, fair, or poor).

14. When creating a histogram, it's important to ensure that the classes of data satisfy which properties? A. They must be all the same size.

B. They must be mutually exclusive and exhaustive.

C. They must include each interval on the number line.

D. The all must be the same height.

15. Your environmental science professor designs an experiment to see whether students in her class care about recycling. She places a recycling bin and a trash bin at the front of the class and then hands out a piece of paper to every student. She asks them to write on the piece of paper their student number, their favorite movie, and whether they own a pet. At the end of the class, she asks all of the students to dispose of the paper before they leave. Then, the professor retrieves the papers from either the trash bin or

recycling and counts how many papers ended up in each bin. In this experiment, what variable is measured? A. How many papers were recycled or thrown in the trash.

B. How many students had pets.

C. How many students listed the same favorite movie.

D. How many students cared about the environment.

16. 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. 8

C. 7

D. 12

17. What's a variable? A. A characteristic or a property of an individual experimental unit

B. A prediction or hypothesis

C. A subset of units

D. A set of units

18. There are several ways to make a bar graph deceptive. Which of these is sometimes used to exaggerate differences from one data value to the next? A. Making the graph shorter than it needs to be

B. A gap in the vertical axis

C. Making the graph taller than it needs to be

D. Starting the vertical axis at a point greater than zero

19. The four elements of a descriptive statistics problem include population/sample, tables/graphs, identifying patterns, and A. characters.

B. data.

C. variables.

D. samples.

20. If a great many data values cluster to the left of a data distribution, which then tails off to the right, the distribution is referred to as A. rightward skewed.

B. normal.

C. uniform.

D. leftward skewed.

End of exam