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Business Statistics, 3rd Edition
book

Business Statistics, 3rd Edition

by Naval Bajpai
April 2024
Intermediate to advanced content levelIntermediate to advanced
921 pages
37h 16m
English
Pearson India
Content preview from Business Statistics, 3rd Edition
Chapter 11
370
Note: The z formula for the difference between the mean values of two populations can also be
manipulated to produce a formula for constructing the con dence intervals for the difference in
two population means. So, the con dence interval to estimate the difference in two population
means can be presented as follows:
Con dence interval to estimate the difference in two population means
() ()xx z
nn
xxz
nn
12
1
2
1
2
2
2
12 12
1
2
1
2
2
2
−− +≤−≤ −+ +
σσ
μμ
σσ
It has already been discussed that when population standard deviations are unknown, sample
standard deviations are good approximations of population standard deviations if the sample
sizes are ...
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Publisher Resources

ISBN: 9789390168996