Construct a 90% confidence interval estimate for the population proportion of consumers that value personalized experience most when shopping in a retail​ store?

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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What do you value most when shopping in a retail​ store? According to a​ survey, 26​% of consumers value personalized experience most. 
a. Suppose that the survey had a sample size of
n=11000. Construct a 90% confidence interval estimate for the population proportion of consumers that value personalized experience most when shopping in a retail​ store?
 
​(Round to four decimal places as​ needed.)
Expert Solution
Step 1

We have

n=11000

p= proportion of consumers value personalized experience most. 

  = 26%

a=alpha= 1-0.90= 0.1

The table value,

Za/2= 1.645

We want to find the confidence interval for true proportion.

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