For the purchase amounts in Exercise 8: a) Construct a 90% confidence interval for the mean purchases

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For the purchase amounts in Exercise 8:

a) Construct a 90% confidence interval for the mean purchases of all customers, assuming that the assumptions and conditions for the confidence interval have been met.

b) How large is the margin of error?

c) How would the confidence interval change if you had assumed that the standard deviation was known to be $20?

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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 06:01 AM

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For the purchase amounts in Exercise 8: a) Construct a 90% confidence interval for the mean purchases

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Business Statistics

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