A student wants to see if the number of times a book has been checked out of the library in the past year and the number of pages in the book are related. She guesses that the number of times a book has been checked out of the library in the past year will be a predictor of the number of pages it has. She randomly sampled 13 books from the library, test her claim at a 0.10 level of significance. number of times checked out number of pages 43 243 11 236 25 280 43 360 38 252 42 350 38 329 37 332 47 439 25 404 18 269 46 412 43 289 The correlation coefficient:   r= (round to 3 decimal places) The equation y=a+bx is: (round to 3 decimal places) y=+ x The hypotheses are:  H0:ρ=0H0:ρ=0  (no linear relationship) HA:ρ≠0HA:ρ≠0  (linear relationship) (claim) Since αα is 0.10 the critical value is -1.796 and 1.796 The test value is:  (round to 3 decimal places) The p-value is:  (round to 3 decimal places) The decision is to   reject H0H0 do not reject H0H0   Thus the final conclusion sentence is   There is enough evidence to reject the claim that there is a linear relationship. There is not enough evidence to reject the claim that there is a linear relationship. There is enough evidence to support the claim that there is a linear relationship. There is not enough evidence to support the claim that there is a linear relationship.

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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A student wants to see if the number of times a book has been checked out of the library in the past year and the number of pages in the book are related. She guesses that the number of times a book has been checked out of the library in the past year will be a predictor of the number of pages it has. She randomly sampled 13 books from the library, test her claim at a 0.10 level of significance.

number of times checked out number of pages
43 243
11 236
25 280
43 360
38 252
42 350
38 329
37 332
47 439
25 404
18 269
46 412
43 289


The correlation coefficient:

 

r= (round to 3 decimal places)

The equation y=a+bx is: (round to 3 decimal places)

y=+ x

The hypotheses are:

 H0:ρ=0H0:ρ=0  (no linear relationship)
HA:ρ≠0HA:ρ≠0  (linear relationship) (claim)

Since αα is 0.10 the critical value is -1.796 and 1.796

The test value is:  (round to 3 decimal places)

The p-value is:  (round to 3 decimal places)

The decision is to

 

  • reject H0H0
  • do not reject H0H0

 

Thus the final conclusion sentence is

 

  • There is enough evidence to reject the claim that there is a linear relationship.
  • There is not enough evidence to reject the claim that there is a linear relationship.
  • There is enough evidence to support the claim that there is a linear relationship.
  • There is not enough evidence to support the claim that there is a linear relationship.
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