With reference to Exercise 8.74, (a) Find a 90% confidence interval for the proportion of customers who
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(a) Find a 90% confidence interval for the proportion of customers who would rate the overall bank services as excellent.
(b) The bank has 8200 customers. Convert your confidence interval for the proportion in part (a) into a 90% confidence interval for the total number of customers who would rate the overall bank services as excellent.
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a We have n 505 and p 258505 05109 So a 90 confidence interval for p is g...View the full answer
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Related Book For 
Statistics Principles And Methods
ISBN: 9780470904114
7th Edition
Authors: Richard A. Johnson, Gouri K. Bhattacharyya
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