Construct a 90% confidence interval for the proportion of handwritten zip codes that were read correctly using
Question:
Construct a 90% confidence interval for the proportion of handwritten zip codes that were read correctly using the data provided in Exercise 9-103. Does this confidence interval support the claim that at least 90% of the zip codes can be correctly read?
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Related Book For 
Applied Statistics And Probability For Engineers
ISBN: 9781118539712
6th Edition
Authors: Douglas C. Montgomery, George C. Runger
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