The mean time taken to design a house plan by 40 architects was found to be 23
Question:
a. Construct a 98% confidence interval for the population mean .
b. Suppose the confidence interval obtained in part a is too wide. How can the width of this interval be reduced? Describe all possible alternatives. Which alternative is the best and why?
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a n 40 23 hours s 375 hours and s sn 37540 59292706 hour df n 1 40 1 39 2 5 982 01 and t 2...View the full answer
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