The trade volume of a stock is the number of shares traded on a given day. The data in the first accompanying?table, in millions?(so that 6.32 represents 6,320,000 shares?traded), represent the volume of a certain stock traded for a random sample of 40 trading days in a certain year. A second random sample of 40 days in the same year resulted in the data in second accompanying table. Complete parts?(a) through?(d) below.

First Sample Volumes (millions of shares traded) 6.30 4.08 6.22 5.96 3.84 2.84 4.62 2.96 3.24 8.84 4.60 2.98 6.52 5.76 3.32 4.68 3. 16 3.98 3.34 5.50 2.94 2.38 6.12 6.02 5.66 3.60 3.00 9.60 5.68 3.98 4.04 3.62 3.74 3.66 4.06 5.22 3.62 3.64 3.28 1.66Second Sample Volumes (millions of shares traded) 3.04 6.00 6.66 3.80 6.88 3.22 9.34 9.38 10.38 4.76 6.64 4.88 4.40 5.48 2.74 3.20 3.42 3.28 4.40 2.86 2.96 4.10 7.50 6.60 5.36 4.88 3.34 2.76 6.24 3.38 3.58 4.10 7.18 3.70 4.40 3.08 1.68 4.38 3.38 3.54 Print Done