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Consider the BLKFRI dataset (available in the Data folder on Brightspace). The YEARS column states the number of years each of the 38 individuals in

Consider the BLKFRI dataset (available in the Data folder on Brightspace). The YEARS

column states the number of years each of the 38 individuals in the sample have gone

shopping on Black Friday. We wish to draw inference about the average number of

years consumers have been shopping on Black Friday in the US.

a. Use the sample to find a 95% Confidence Interval for the average number of

years consumers have been shopping on Black Friday in the US.

b. Use the sample to find a 97% Confidence Interval for the average number of

years consumers have been shopping on Black Friday in the US.

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