A sample of 75 concrete blocks had a mean mass of 38.3 kg with a standard deviation

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A sample of 75 concrete blocks had a mean mass of 38.3 kg with a standard deviation of 0.6 kg.

a. Find a 95% confidence interval for the mean mass of this type of concrete block. (Round the final answers to three decimal places.)

The 95% confidence interval is ( , ).

b. Find a 99% confidence interval for the mean mass of this type of concrete block. (Round the final answers to three decimal places.)

The 99% confidence interval is ( , ).

Related Book For answer-question

Applied Statistics in Business and Economics

ISBN: 978-0073521480

4th edition

Authors: David Doane, Lori Seward

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Posted Date: Apr 06, 2022 01:19 AM

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A sample of 75 concrete blocks had a mean mass of 38.3 kg with a standard deviation

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Solution Given That Mean X 383 CI 95 Sample Size n 75 df n1 Std d... View the full answer

Applied Statistics in Business and Economics

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