2.99
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The following is a set of data from a sample of n = 6:

7 4 9 7 3 12

a. Compute the first quartile (Q1), the third quartile (Q3), and the interquartile range.

b. List the five-number summary.

c. Construct a boxplot and describe its shape.

d. Compare your answer in (c) with that from Problem 3.2 (d) on page 134. Discuss.