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C. Simplity 9. Which of the following is the range of the correlation coefficient (r)? C. -1

C. Simplity 9. Which of the following is the range of the correlation coefficient (r)? C. -1

Big Ideas Math A Bridge To Success Algebra 1: Student Edition 2015
Big Ideas Math A Bridge To Success Algebra 1: Student Edition 2015
1st Edition
ISBN:9781680331141
Author:HOUGHTON MIFFLIN HARCOURT
Publisher:HOUGHTON MIFFLIN HARCOURT
Chapter4: Writing Linear Equations
Section4.5: Analyzing Lines Of Fit
Problem 25E
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C. Simplity 19. Which of the following is the range of the correlation coefficient (r)? C. -1 <r < 1 B. 1 ≤rs-1 D. -1 ≤rs 1 A. 0≤r≤ 1 20. Using the given summation values below, what is the value of Pearson r? n = 3 Σχ = 10 Σy = 15 Σxy = 60 Σx = 14 Σy2 = 450 A. -0.06 B. 0 C. 0.11 D. 1 21. Which of the following statements about correlation is NOT correct? A. Every correlation has strength only. B. Correlation is a number from -1 and 1. C. A correlation can either be positive or negative. D. Correlation determines the direction between two variables 22. Miguel needs to analyze the strength of the relationship between two variables. What is the correct statistical method he needs to conduct? A. Z-test B. Pearson co C. Pearson alpha D. Pearson's sample correlation coefficient 23. Which of the following Pearson coefficients is considered having the weakest negative correlation? A. 0.45 B. -0.1 C. -0.45 D. -0.98 24. There is a survey indicating that as weather gets colder, air-conditioning costs decrease. Which of the following values of r is appropriate to the result of the survey? A. -0.93 B. 0 C. 0.19 D. 0.87 25. The correlation coefficient r between the number of bags of popcorn and the number of sodas sold at each performance of the circus over one week was found to be 0.62. Which conclusion can be drawn from the result? A. There is no correlation between popcorn sales and soda sales. B. There is a strong positive correlation between popcorn sales and soda sales. C. There is a weak positive correlation between popcorn sales and soda sales. D. There is a strong negative correlation between popcorn sales and soda sales.
Transcribed Image Text:C. Simplity 19. Which of the following is the range of the correlation coefficient (r)? C. -1 <r < 1 B. 1 ≤rs-1 D. -1 ≤rs 1 A. 0≤r≤ 1 20. Using the given summation values below, what is the value of Pearson r? n = 3 Σχ = 10 Σy = 15 Σxy = 60 Σx = 14 Σy2 = 450 A. -0.06 B. 0 C. 0.11 D. 1 21. Which of the following statements about correlation is NOT correct? A. Every correlation has strength only. B. Correlation is a number from -1 and 1. C. A correlation can either be positive or negative. D. Correlation determines the direction between two variables 22. Miguel needs to analyze the strength of the relationship between two variables. What is the correct statistical method he needs to conduct? A. Z-test B. Pearson co C. Pearson alpha D. Pearson's sample correlation coefficient 23. Which of the following Pearson coefficients is considered having the weakest negative correlation? A. 0.45 B. -0.1 C. -0.45 D. -0.98 24. There is a survey indicating that as weather gets colder, air-conditioning costs decrease. Which of the following values of r is appropriate to the result of the survey? A. -0.93 B. 0 C. 0.19 D. 0.87 25. The correlation coefficient r between the number of bags of popcorn and the number of sodas sold at each performance of the circus over one week was found to be 0.62. Which conclusion can be drawn from the result? A. There is no correlation between popcorn sales and soda sales. B. There is a strong positive correlation between popcorn sales and soda sales. C. There is a weak positive correlation between popcorn sales and soda sales. D. There is a strong negative correlation between popcorn sales and soda sales.
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