Here are data from a small bookstore The regression line is: Sales = 8.10 + 0.9134 Number

Question:

Here are data from a small bookstore image text in transcribed

The regression line is:
Sales = 8.10 + 0.9134 Number of Salespeople Working.
The assumptions and conditions for regression are met, and from technology we learn that SE1b12 = 0.0873 se = 1.477

a) Find the predicted Sales on a day with 12 employees working.

b) Find a 95% confidence interval for the mean Sales on days that have 12 employees working.

c) Find the 95% prediction interval for Sales on a day with 12 employees working.

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Business Statistics

ISBN: 9781292269313

4th Global Edition

Authors: Norean Sharpe, Richard De Veaux, Paul Velleman

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Question Posted: Sep 07, 2024 08:04 AM

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Here are data from a small bookstore The regression line is: Sales = 8.10 + 0.9134 Number

Question:

Number of Salespeople Working 2 Sales (in $1000's) 10 3 11 7 13 9 14 10 18 10 12 220 15 22 16 22 20 26 x = 10.4 SD(x) = 5.64 y = 17.6 SD (y) = 5.34

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Business Statistics

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