Site_A         Site_B $115           $110$79             $79$40             $37$138          $129$96            $96$28            $28$84            $69$98            $98$116         $106$69           $66   Using software or a​ calculator, construct a​ 90% confidence interval comparing the population mean prices of all textbooks used that term at her college​ (price at Site A minus price at Site​ B). Interpret. Select the correct choice below and fill in the answer boxes to complete your choice. ​(Round to three decimal places as​ needed.)   A. It is plausible that the population mean price difference is 0 because 0 does not lie in the confidence interval left parenthesis nothing comma nothing right parenthesis .,.   B. It is plausible that the population mean price difference is 0 because 0 lies in the confidence interval left parenthesis nothing comma nothing right parenthesis .,.   C. It is not plausible that the population mean price difference is 0 because 0 does not lie in the confidence interval left parenthesis nothing comma nothing right parenthesis .,.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 1GP
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Site_A         Site_B

$115           $110
$79             $79
$40             $37
$138          $129
$96            $96
$28            $28
$84            $69
$98            $98
$116         $106
$69           $66

 

Using software or a​ calculator, construct a​ 90% confidence interval comparing the population mean prices of all textbooks used that term at her college​ (price at Site A minus price at Site​ B). Interpret.

Select the correct choice below and fill in the answer boxes to complete your choice.
​(Round to three decimal places as​ needed.)
 
A. It is plausible that the population mean price difference is 0 because 0 does not lie in the confidence interval left parenthesis nothing comma nothing right parenthesis .,.
 
B. It is plausible that the population mean price difference is 0 because 0 lies in the confidence interval left parenthesis nothing comma nothing right parenthesis .,.
 
C. It is not plausible that the population mean price difference is 0 because 0 does not lie in the confidence interval left parenthesis nothing comma nothing right parenthesis .,.
 
 
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