# Understanding Basic Statistics Chapter Exam

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#### Question 1 1. A student's grade in a Psychology course is comprised of tests (40%), quizzes (20%), papers (20%), and a final project (20%). His scores for each of the categories are 85 (tests), 100 (quizzes), 92 (papers) and 84 (final project). Calculate his overall grade.

#### Question 2 2. In a History course, a student's grade is composed of papers (40%), tests (40%) and a final exam (20%). The student has earned a 90 value on all papers and 80 value on all tests. What is the minimum score the student needs to earn on the final exam to achieve an overall grade of a B+ (87.0 before rounding)?

#### Question 3 3. Why would you use a weighted average instead of a traditional average calculation?

#### Question 4 4. Below is a chart showing the number of goals a hockey team scored in a game and how many times each value occurred over a full 82 game season. Calculate the average number of goals/game that the team scored.

#### Question 5 5. The Entertainment package on DirecTV currently costs $57.99/month with promotional discounts of $28/month for the first year and $10/month for the second year when signing a two-year contract. The America's Top 120 package on Dish Network costs slightly less at $54.99/month but only has a promotional discount of $25/month for the first year with no discount in the second year when signing a two-year contract. Calculate which service has a lower average monthly price over the two-year period and the difference in the average monthly price between the two packages.

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Question 6
6.
The following data set represents the minimum wage for 1990-2000. Calculate the median.

8.25, 9.8, 7.25, 7.25, 7.25, 8.75, 8.44, 9.5, 9.6, 9.5

#### Question 7 7. Which of the following describes the best approach to finding the median of an even set of numbers?

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Question 8
8.
The following data set represents the average number of children per family for 10 countries in 2014. Calculate the mean number of children per family.

5.8, 6.1, 1.9, 1.4, 2.6, 2.8, 1.3, 4.4, 4.4, 1.7

#### Question 9 9. The value that occurs the most frequently in a data set is known as the _____.

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Question 10
10.
The following data set represents the average annual temperatures for 10 European countries in 2016 (Celsius). Calculate the range.

1.75, 9.8, 7.55, 10.55, 5.8, 9.45, 19.2, 18.45, 16.2, 5.8

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#### Question 11 11. What is the difference between the upper quartile value and the lower quartile value?

#### Question 12 12. What is the measure of how far the numbers in a data set are away from the mean or the median?

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Question 13
13.
What is the range of the data set below?

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

#### Question 14 14. What are three methods you can use to find the spread in data?

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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.
The following data represents the test scores of eight students in Mr. Miller's science class.

92%, 91%, 89%, 95%, 45%, 88%, 90%, 91%

The student who got a 45% is _____.

#### Question 17 17. All of the following statements are correct, EXCEPT:

#### Question 18 18. If there are two modes, you should _____.

#### Question 19 19. Which of the following is least likely to be reported due to it being the one most likely to change by the introduction of additional scores?

#### Question 20 20. If all other statistical procedures fail, the best predictor of a score will be the _____.

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Question 21
21.
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 22
22.
Find the interquartile range for the following data set:

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

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Question 23
23.
Find the first quartile for the following data set:

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

#### Question 24 24. What is the difference between the upper quartile value and the lower quartile value?

#### Question 25 25. What is a group of values and/or means that divide a data set into quarters, or groups of four?

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Question 26
26.
Find the maximum in the data set:

27, 26, 33, 45, 38, 38, 58, 54, 19, 22, 31

#### Question 27 27. What is the largest mathematical value in a data set?

#### Question 28 28. What is a value that is much larger or smaller than the other values in a data set, or a value that lies outside the given data set?

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Question 29
29.
What is the minimum in the data set?

105, 88, 93, 102, 97, 93, 96, 86, 88, 82, 79, 85, 77, 94, 91, 87

#### Question 30 30. What is the smallest mathematical value in a data set?

#### Understanding Basic Statistics 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!