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  3. 8.44 the mean time taken to design a house plan by

8.44 The mean time taken to design a house plan by 40 architects was found to...

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Basic Math

8.44 The mean time taken to design a house plan by 40 architectswas found to be 23 hours with a standard deviation of 3.75hours.

a. Construct a 98% confidence interval for the population mean?.

b. Suppose the confidence interval obtained in part a is toowide. How can the width of this interval be reduced? Describe allpossible alternatives. Which alternative is the best and why?

Answer & Explanation Solved by verified expert
4.4 Ratings (589 Votes)
ab Increase the sample size The more data in the    See Answer
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