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# Working with Data Sets in Math Chapter Exam

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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#### Question 1 1. Based on the following table, which competitor was the first to complete the race?

#### Question 2 2. What is ordinal ranking?

#### Question 3 3. Based on the following table, which competitor was the last to complete the race?

#### Question 4 4. What does variance show?

#### Question 5 5. What does the spread in a data set measure?

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#### Question 6 6. To find _____, subtract each number from the mean, square the result, add the numbers, and finally, divide the result by the total amount of numbers in the data set.

#### Question 7 7. Sharon owns a language school and she wants to introduce new language exchange programs. In order to know how students and parents will respond to these programs she decides to collect qualitative data. What is she most likely going to do?

#### Question 8 8. Mary owns a german bakery shop and she wants to open a new one on the other side of the city. She decides to gather quantitative data to determine if there is a need of a bakery such as hers in that area. What is she most likely going to do?

#### Question 9 9. Jeff owns a cocktail bar and he is working on the design of new hot cocktail recipes in order to increase profitability during the cold season. He decides to use predictive statistics to determine whether it will be a good idea to spend time and energy developing these recipes. Which of the following strategies is he most likely going to choose?

#### Question 10 10. What does inferential statistics aim at?

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#### Question 11 11. The interquartile range is a value that is the difference between _____.

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Question 12
12.
Find the interquartile range for the following data set:

7, 9, 13, 4, 18, 3, 9, 10, 15, 8, 2, 6, 9

#### Question 13 13. What is the difference between the upper quartile value and the lower quartile value?

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Question 14
14.
Find the first quartile for the following data set:

7, 9, 13, 4, 18, 3, 9, 10, 15, 8, 2, 6, 9

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Question 15
15.
What is the variance of the data set below?

3, 7, 9, 11, 11, 11, 15, 17, 18, 24

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#### Question 16 16. What are three methods you can use to find the spread in data?

#### Question 17 17. What is the measure of how far the numbers in a data set are away from the mean or the median?

#### Question 18 18. Why does statistics often refer to being 95% confident and not 100%?

#### Question 19 19. A company is trying to determine what products it should develop in the next 10 years. They are analyzing data from their sales, as well as the data from the leading 10 companies in the industry in order to try and find a pattern of what products could be most successful. What type of statistics is the company using?

#### Question 20 20. Which of the following is NOT done by statistical software?

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#### Question 21 21. For her research project, Jerri interviewed ten people asking them the same open-ended questions. What type of research did Jerri engage in?

#### Question 22 22. Juan was analyzing a business he was thinking of buying. He looked at the daily sales records, the number of unique customers, and the number of repeat customers. He used statistics generated by this data to help him make his decision. What kind of research did Juan use?

#### Question 23 23. Bill completed both qualitative and quantitative research, analyzed the data, and interpreted his findings. What is Bill now ready to do?

#### Question 24 24. What is a ranking system in which the mathematical values that are equal are given equal rank and the next, lesser value is given the next highest rank?

#### Question 25 25. What is a system of ordering in which the mathematical values that are equal are given the mean of the ranking positions?

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#### Question 26 26. What is a system of ordering where each mathematical value is given a certain position in a sequence of numbers, where no positions are equal?

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Question 27
27.
Find the second quartile, or the median, for the following data set:

7, 9, 13, 4, 18, 3, 9, 10, 15, 8, 2, 6, 9

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Question 28
28.
What is the range of the data set below?

3, 7, 9, 11, 11, 11, 15, 17, 18, 24

#### Question 29 29. Identify which of the following is NOT an example of descriptive statistics:

#### Question 30 30. LaToya looked for patterns and themes in the answers she got from the customers she had visited. What was LaToya doing?

#### Working with Data Sets in Math Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!