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Get Full Access to Stats Modeling The World - 4 Edition - Chapter 26 - Problem 42
Get Full Access to Stats Modeling The World - 4 Edition - Chapter 26 - Problem 42

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# More sales and profits Consider again the relationship between the sales and profits of

ISBN: 9780321854018 481

## Solution for problem 42 Chapter 26

Stats Modeling the World | 4th Edition

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Problem 42

More sales and profits Consider again the relationship between the sales and profits of Fortune 500 companies that you analyzed in Exercise 40. a) Find a 95% confidence interval for the slope of the regression line. Interpret your interval in context. *b) Last year the drug manufacturer Eli Lilly, Inc., reported gross sales of $9 billion (thats$9,000 million). Create a 95% prediction interval for the companys profits, and interpret your interval in context.

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STAT 110 – Notes for Week of 9/20/16  Chapter 11 Continued o Stemplot: essentially a histogram turned on its side. It shows the exact values of a distribution. It is used for smaller distributions, since all of the values need to be listed. Also known as a stem-and-leaf plot. o Each observation is separated into a stem (all of the digits of a value except the last digit) and a leaf (the last digit of a value). o There is a line between each stem and the leaf; write each leaf to the right of each stem.  For example, if you had the values 40, 42, 43, and 45, the stemplot would say: 4 | 0 2 3 5 . o You also use a stemplot to determine whether a distribution is skew

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