Question 1:

Explain the importance of sampling.

Question2:

Describe the differences between primary data and secondary data.

Question 3:

The first four moments about the mean of a distribution are 12, 13, 54, 56, and 25. Find coefficient of skewness and kurtosis.

Question 4:

A die is rolled, and two coins are tossed. Find the probability of rolling a 5 and flipping two tails.

Note most be in typing form.