Introductory Statistics (10th Edition)
10th Edition
ISBN: 9780321989178
Author: Neil A. Weiss
Publisher: PEARSON
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Question
Chapter 8.2, Problem 65E
a.
To determine
To construct: The 90% confidence interval for the population mean.
b.
To determine
To find: The margin of error using the confidence interval.
c.
To determine
To find: The margin of error using the usual formula.
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In each of Exercises, we provide a sample mean, sample size, sample standard deviation, and confidence level. In each exercise,
a.use the one-mean t-interval procedure to find a confidence interval for the mean of the population from which the sample was drawn.b.obtain the margin of error by taking half the length of the confidence interval.c.obtain the margin of error by using the formula ta/2•s/vn.
x = 30, n = 25, s = 4, confidence level = 90%
In each of Exercises, we provide a sample mean, sample size, sample standard deviation, and confidence level. In each exercise,
a.use the one-mean t-interval procedure to find a confidence interval for the mean of the population from which the sample was drawn.b.obtain the margin of error by taking half the length of the confidence interval.c.obtain the margin of error by using the formula ta/2•s/vn.
x = 20, n = 36, s = 3, condence level = 95%
Find the value for t a/2.
n=15 for the 98% confidence interval for the mean
Chapter 8 Solutions
Introductory Statistics (10th Edition)
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