Suppose the shipping weight of your cheese shop\'s customized gift baskets is as

Question

Suppose the shipping weight of your cheese shop's customized gift baskets is asymmetrically distributed with unknown mean and standard deviation. For a sample of 45 orders, the mean weight is 66 ounces and the standard deviation is 10.2 ounces.

What is the upper bound of the 95 percent confidence interval for the gift basket's average shipping weight?

Note that the correct answer will be evaluated based on the z-values in the summary table in the Teaching Materials section.

Please round your answer to the nearest tenth.

Explanation / Answer

Solution:- Given that n = 45, mean = 66ounces , sd = 10.2ounces

95% confidence interval for the Z = 1.96

95 percent confidence interval for the gift basket's average shipping weight : X +/- Z*s/sqrt(n)

= 66 +/- 1.96*10.2/sqrt(45)

= (63.0198 , 68.9802)

= (63.0 , 69.0)

the upper bound : 69.0

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