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Suppose you are given the following data involving weekly sales and test scores supposedly designed to pick out the "best" salespersons. 1. 2. 3. 4. 5. Salesperson Mr. Amber Mr. Archer Ms. Smith Mr. Malcolm Ms. Goodwin Test Score (x) 4 2 3 6. 10 Weekly Sales (y)-in thou, of dolla $6 $12 $4 $8 $11 Calculate the correlation coefficient, r. Calculate the coefficient of determination, r; of non determination. Interpret them. Suppose you wish to test for the significance of r, the correlation coefficient, in problem 7a, given that n=5. Using the .01 level of significance, test the hypothesis that r is not different from 0 versusthe hypothesis that r is different from 0 (remember r can be between -1 and +1) in the population. Do you accept or reject the null hypothesis?

Suppose you are given the following data involving weekly sales and test scores supposedly designed to pick out the "best" salespersons. 1. 2. 3. 4. 5. Salesperson Mr. Amber Mr. Archer Ms. Smith Mr. Malcolm Ms. Goodwin Test Score (x) 4 2 3 6. 10 Weekly Sales (y)-in thou, of dolla $6 $12 $4 $8 $11 Calculate the correlation coefficient, r. Calculate the coefficient of determination, r; of non determination. Interpret them. Suppose you wish to test for the significance of r, the correlation coefficient, in problem 7a, given that n=5. Using the .01 level of significance, test the hypothesis that r is not different from 0 versusthe hypothesis that r is different from 0 (remember r can be between -1 and +1) in the population. Do you accept or reject the null hypothesis?

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter4: Equations Of Linear Functions
Section4.6: Regression And Median-fit Lines
Problem 17HP
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a. b. Suppose you are given the following data involving weekly sales and test scores supposedly designed to pick out the "best" salespersons. 1. 2. 3. 5. Salesperson Mr. Amber Mr. Archer Ms. Smith Mr. Malcolm Ms. Goodwin Test Score (x) 4 2 3 6. 10 Weekly Sales (y)-in thou, of dollars $6 $12 $4 $8 $11 Calculate the correlation coefficient, r. Calculate the coefficient of determination, r; of non determination. Interpret them. Suppose you wish to test for the significance of r, the correlation coefficient, in problem 7a, given that n-5. Using the .01 level of significance, test the hypothesis that r is not different from 0 versusthe hypothesis that r is different from 0 (remember r can be between -1 and +1) in the population. Do you accept or reject the null hypothesis?
Transcribed Image Text:a. b. Suppose you are given the following data involving weekly sales and test scores supposedly designed to pick out the "best" salespersons. 1. 2. 3. 5. Salesperson Mr. Amber Mr. Archer Ms. Smith Mr. Malcolm Ms. Goodwin Test Score (x) 4 2 3 6. 10 Weekly Sales (y)-in thou, of dollars $6 $12 $4 $8 $11 Calculate the correlation coefficient, r. Calculate the coefficient of determination, r; of non determination. Interpret them. Suppose you wish to test for the significance of r, the correlation coefficient, in problem 7a, given that n-5. Using the .01 level of significance, test the hypothesis that r is not different from 0 versusthe hypothesis that r is different from 0 (remember r can be between -1 and +1) in the population. Do you accept or reject the null hypothesis?
Use the following data for both problems Test score 8 6 Mr. Amber Mr. Archer Ms Smith Mr. Malcolm Mr. Goodwin Ms. Bly Ms.Rain 15 Use x=5 for Part III of the regression problem (prediction interval). 5 10 9 7 parts a-b) 4 Weekly sales (in millions) 13 14 9 12 11 10
Transcribed Image Text:Use the following data for both problems Test score 8 6 Mr. Amber Mr. Archer Ms Smith Mr. Malcolm Mr. Goodwin Ms. Bly Ms.Rain 15 Use x=5 for Part III of the regression problem (prediction interval). 5 10 9 7 parts a-b) 4 Weekly sales (in millions) 13 14 9 12 11 10
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