Regression & Correlation Chapter Exam

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!

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Question 1 1. A scientist is graphing data points from an experiment, and concludes that the data set is linear. Why did they likely draw this conclusion?

Question 2 2. 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?

Question 3 3. Which of the following problems could be studied through the use of regression analysis?

Question 4 4. Find the correlation coefficient between the two values. Is there a positive or negative correlation?

Question 5 5. A scientist plots data points from an experiment, and notices that the dependent variables and the independent variables in the data set are decreasing together. What kind of correlation have they discovered, and why?

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Question 6 6. The _____ refers to the consistent change between x and y in a formula.

Question 7 7. What is the relationship between two sets of variables used to describe or predict information?

Question 8 8. In the equation y = 4x +15, what does 15 represent?

Question 9 9. A _____ attempts to predict the relationship between two points.

Question 10 10.

For the following equation, identify the slope, the intercept, and interpret the meaning of each for the scenario.

y= 7.5x - 3

James just got a new job. He will make a certain amount of money per hour, but he will also receive a one-time deduction to pay for his new uniform.

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Question 11 11. What transformation doesn't work for data sets that only contain positive values?

Question 12 12.

Use the square root model, as presented in the lesson, to transform the following data set:

(5, 25) (2, 16) (4, 9) (7, 4) (12, 36)

Question 13 13. How are independent variables and dependent variables different?

Question 14 14. What is a condition or piece of data in an experiment that can be controlled or changed?

Question 15 15. What is a graph of ordered pairs showing a relationship between two sets of data?

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Question 16 16. What is the slope intercept formula?

Question 17 17. Which one of the following coefficients indicates the strongest relationship between two variables while remaining within the possible range of correct calculations?

Question 18 18. What is the relationship between two variables or sets of data?

Question 19 19. Which one of the following coefficients indicates that the two variables of interest move in opposite directions while remaining within the possible range of correct calculations?

Question 20 20. In order to transform nonlinear data, the data must be both _____ and _____.

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Question 21 21. What is it called when data is always positive or always negative?

Question 22 22.

The correlation coefficient between the number of girls passing in Physics at grade 9 and the number of girls passing in Physics at grade 11 is 0.

Identify the correct statement for the above.

Question 23 23. José wants to calculate a correlation; which of the following graphs should he use?

Question 24 24. What does normality mean in analyzing residuals?

Question 25 25. What is a condition or piece of data in an experiment that can be controlled or changed?

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Question 26 26. What is a graph of ordered pairs showing a relationship between two sets of data?

Question 27 27. Zoe needs to analyze the strength of the relationship between two variables. What is the correct name for the test she needs to conduct?

Question 28 28.

Find the regression line equation using the formulas for the following data set:

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

Question 29 29. What is the range of the coefficient value?

Question 30 30. Imagine you are looking at a graph that shows a correlational line moving from the bottom left corner of the graph to the upper right corner. Which correlation coefficient below would best represent the pattern of data while remaining within the possible range of correct calculations?

Regression & Correlation 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!

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