he weights of 5 squash (in pounds) are 10,17,17.5,18.5, and 19.5. The sample weights have a mean of x=16.5. The accepted population standard deviation for this type of squash is =1.25.

1)

What is the margin of error at the 90% confidence level?

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Correct

0.920

At the 90% confidence level, the critical value is z=1.645. Thus, the margin of error is

m=zn=1.6451.2550.920

2)

What is the margin of error at the 99% confidence level?

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3)

What is the 90% confidence interval?

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4)

What is the 99% confidence interval?