1. A confidence interval for a population mean has length 12. a. determine the margin of...

Question

Question

1. A confidence interval for a population mean has length 12.

a. determine the margin of error.

b. if the sample mean is 60, obtain the confidence interval.

math Statistics-And-Probability

Answer 1

Answer #1

Length of confidence interval = 12

a)

Margin of error (e) :

Margin of error = Length of confidence interval / 2

= 12/2

= 6

Margin of error = 6

b)

Sample mean =

Confidence interval is

Confidence interval is (54, 66)

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Answer 2

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