SOLUTION: .Sales personnel for Skillings Distributors submit weekly reports listing the customer contacts
made during the week. A sample of 65 weekly reports showed a sample mean of 19.5
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made during the week. A sample of 65 weekly reports showed a sample mean of 19.5
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Question 637440: .Sales personnel for Skillings Distributors submit weekly reports listing the customer contacts
made during the week. A sample of 65 weekly reports showed a sample mean of 19.5
customer contacts per week. The sample standard deviation was 5.2. Provide 90% and 95%
confidence intervals for the population mean number of weekly customer contacts for the
sales personnel. Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! Sales personnel for Skillings Distributors submit weekly reports listing the customer contacts made during the week.
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A sample of 65 weekly reports showed a sample mean of 19.5 customer contacts per week. The sample standard deviation was 5.2.
Provide 90% and 95% confidence intervals for the population mean number of weekly customer contacts for the sales personnel.
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90% CI:
x-bar = 19.5
ME = 1.645*5.2/sqrt(65) = 1.0610
CI::::: 19.5-1.0610 < u < 19.5+1.0610
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95% CI:
x-bar = 19.5
ME = 1.96*5.2/sqrt(65) = 1.2642
CI: 19.5-1.2642 < u < 19.5+1.2642
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Cheers,
Stan H.
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