A Sample of size n 89 has sample mean x 87 2 and sample standard deviation s 5 3 Construct a 95 confidence interval for the population mean b If the confidence level were 99 , would the confidence interval be narrower or wider ( I am having trouble figuring out how the t critical value of 1 963 is ...

The provided sample mean is X 872 and the sample standard de ...

A Sample of size n = 89 has sample mean x = 87.2 and sample standard deviation

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A Sample of size n = 89 has sample mean x̄ = 87.2 and sample standard deviation s = 5.3.

Construct a 95% confidence interval for the population mean ?.
b. If the confidence level were 99%, would the confidence interval be narrower or wider?

( I am having trouble figuring out how the t-critical value of 1.963 is calculated as the answer for (a) and t-critical value for b)

Related Book For answer-question

Introduction to Business Statistics

ISBN: 978-1111524081

7th edition

Authors: Ronald M. Weiers

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Posted Date: Jun 05, 2022 06:10 AM

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A Sample of size n = 89 has sample mean x = 87.2 and sample standard deviation

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Introduction to Business Statistics

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