Question: 1) In a study using 15 samples, and in which the population standard deviation is not known, state the distribution that should be used to

1) In a study using 15 samples, and in which the population standard deviation is not known, state the distribution that should be used to calculate confidence interval and the associated parameter(s) and why this distribution is used.

2) Compute the sample size needed to be 95% confident with an acceptable error of 3 and a sample standard deviation of 9.

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