Construct a 98% confidence interval for the average value of y for Problem 12.8; use x =

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Construct a 98% confidence interval for the average value of y for Problem 12.8; use x = 20. Construct a 98% prediction interval for a single value of y for Problem 14.3; use x = 20.Which is wider? Why?

In Problem 12.8

Advertising Sales

12.5 ..............148

3.7 .............. 55

21.6 ..............338

60.0 ..............994

37.6 ..............541

6.1 .............. 89

16.8 ..............126

41.2 ..............379

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Business Statistics for Contemporary Decision Making

ISBN: 978-0470910184

6th Edition

Authors: Ken Black

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Question Posted: Mar 19, 2013 05:50 AM

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Construct a 98% confidence interval for the average value of y for Problem 12.8; use x =

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x 0 20 For 98 confidence a 2 01 df n 2 8 2 6 t 016 3143 24937...View the full answer

Business Statistics for Contemporary Decision Making

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