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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 9
PB
Statistical Inference: Estimation for Single Populations
319
Example 9.11
The organized sector has a 70% market share in the storage batteries segment in India.
6
Suppose
a researcher wants to check this market share. For this purpose, the researcher has taken a ran-
dom sample of 120 customers of storage batteries. Out of 120 customers, 86 customers have
purchased from the organized market. Assuming customers to be normally distributed, construct
a 95% con dence interval for estimating the population proportion.
Solution: For this question, p ==
86
120
0.71667
;
q =− =()1 0.71667 0.28333
; n = 120
The required 95% con dence interval is ...
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Publisher Resources

ISBN: 9789390168996