Question 824430: The shopping times were recorded for 64 randomly selected customers for a local supermarket. The average and variance of the 64 shopping times were 33 minutes and 256, respectively. Estimate the true average shopping time per customer, with a confidence coefficient of 1- = 0.90.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! The shopping times were recorded for 64 randomly selected customers for a local supermarket. The average and variance of the 64 shopping times were 33 minutes and 256, respectively.
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Estimate the true average shopping time per customer, with a confidence coefficient of 1- = 0.90.
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x-bar = 33 min
ME = 1.645 = 3.29
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90% CI: 33-3.29 < u < 33+3.29
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Cheers,
Stan H.
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