# MTLE Life Science: Using Statistics Chapter Exam

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#### Question 1 1. Chi square measures:

#### Question 2 2. How is the p-value used when working with chi square tables?

#### Question 3 3. Which p-value would indicate that the null hypothesis should be accepted?

#### Question 4 4. How is the degree of freedom found when working with chi square tables?

#### Question 5 5. What is a straight line that attempts to predict the relationship between two points, also known as a trend line or line of best fit?

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#### Question 6 6. What is the relationship between two sets of variables used to describe or predict information?

#### Question 7 7. What is a graph of ordered pairs showing a relationship between two sets of data?

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Question 8
8.
Use a ruler or a graphing calculator to find the regression line of the following data set:

(2, 3) (4, 6) (5, 1) (2, 4) (1, 3) (6, 3)

#### Question 9 9. Bobby is looking at the relationship between amount of sleep and happiness levels and sees that his data shows a tight line that goes up and to the right. What type of correlation does Bobby see?

#### Question 10 10. The scatterplot below shows _____ correlation between the two data sets.

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#### Question 11 11. As one data set increases, the other must _____ in order to show a positive correlation.

#### Question 12 12. No correlation between two sets of data means all of the following EXCEPT:

#### Question 13 13. Chi square is used to determine how close _____ data is to expected data.

#### Question 14 14. If a set of data consists of three categories, you will need to take the sum of _____ values to calculate chi square.

#### Question 15 15. The symbol for chi is:

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#### Question 16 16. A small chi square value means:

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Question 17
17.
Find the range for one standard deviation in the following data set:

16, 20, 14, 24, 16, 19, 30, and 8

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Question 18
18.
Find the standard deviation for the following data set:

101, 106, 125, 142, 78, and 109

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Question 19
19.
Find the standard deviation for the following data set:

16, 20, 14, 24, 16, 19, 30, and 8

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Question 20
20.
Find the variance for the following data set:

16, 20, 14, 24, 16, 19, 30, and 8

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#### Question 21 21. During the first four Summer Olympic games attended by the United States, these medal counts were awarded. If there is an outlier, identify it from the number of medals won during these Olympic Games.

#### Question 22 22. During the first four Summer Olympic games attended by the United States, these medal counts were awarded. Calculate the median number of medals won during these Olympic Games.

#### Question 23 23. During the first four Summer Olympic games attended by the United States, these medal counts were awarded. Calculate the mode number of medals won during these Olympic Games.

#### Question 24 24. During the first four Summer Olympic games attended by the United States, these medal counts were awarded. Calculate the mean number of medals won during these Olympic Games. (Round it to the nearest whole number.)

#### Question 25 25. What is the relationship between two sets of variables used to describe or predict information?

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#### Question 26 26. Which of the following problems could be studied through the use of regression analysis?

#### Question 27 27. What do we call a prediction where a variable (y) is dependent on a second variable (x) based on the regression equation of a given set of data?

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Question 28
28.
Find the regression line equation using the formulas in the lesson for the following data set:

(1, 3) (2, 4) (3, 5)

#### Question 29 29. What type of hypothesis states that its variables are not related?

#### Question 30 30. What do we call two sets of variables that can change and are compared to find relationships?

#### MTLE Life Science: Using 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!