Homework Help is Here – Start Your Trial Now!
Math
Statistics
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

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
See similar textbooks
icon
Related questions
Question
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.
Expert Solution
steps

Step by step

Solved in 2 steps

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
Elementary Statistics: Picturing the World (7th E…
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
The Basic Practice of Statistics
The Basic Practice of Statistics
Statistics
ISBN:
9781319042578
Author:
David S. Moore, William I. Notz, Michael A. Fligner
Publisher:
W. H. Freeman
Introduction to the Practice of Statistics
Introduction to the Practice of Statistics
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman
SEE MORE TEXTBOOKS