Q1) Describe the difference between sample and a sampling distribution. Your reply must be in complete sentences and you may use sketches to help you.

Q2)  In developing confidence interval estimate for population mean, which of the following is true?

a) Larger the sample standard deviation, wider will be interval estimate, all other things being equal.

b)  If population standard deviation is unknown, suitable critical value must be obtained from t-distribution.

c)  Confidence interval developed from smaller sample size will have larger margin of error than one obtained by using a larger sample size, all other things being equal.

d)  All of the above are true.