Basic Business Statistics, Student Value Edition (13th Edition)
Basic Business Statistics, Student Value Edition (13th Edition)
13th Edition
ISBN: 9780321946393
Author: Mark L. Berenson, David M. Levine, Kathryn A. Szabat
Publisher: PEARSON
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Chapter 10, Problem 2PS

Assume that you have a sample of n 1 = 8 , with the sample mean X ¯ 1 = 42 , and a sample standard deviation S 1 = 4 , and you have an independent sample n 2 = 15 from another population with a sample of n 2 = 15 from another population with a sample X ¯ 2 = 34 and a sample standard deviation S 2 = 5.

a. What is the value of the pooled-variance t S T A T test statistic for testing H 0 : μ 1 = μ 2 ?

b. In finding the critical value, how many degrees of freedom are there?

c. Using the level of significance α = 0.01 , what is the critical value for a one-tail test of the hypothesis H 0 : μ 1 μ 2 against the alternative, H 1 : μ 1 > μ 2 ?

d. What is your statistical decision?

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Chapter 10 Solutions

Basic Business Statistics, Student Value Edition (13th Edition)

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