Question: A sample of size = n 40 has mean = x 15.4 and standard deviation = s 3.3 . Estimate the sample size needed so

A sample of size

=n40

has mean

=x15.4

and standard deviation

=s3.3

. Estimate the sample size needed so that a

97%

confidence interval for

will have a margin of error equal to

2.5

. Round your answer to next whole number.

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