Days to Maturity: The first two columns of the following table provide a fre- quency distribution, using limit grouping, for the days to maturity of 40 short-term investments, as found in BARRON's. The third column shows the class marks. Days to maturity Frequency (f) Class mark 30-39 3 34.5 40-49 1 44.5 50-59 8 54.5 60-69 10 64.5 70-79 7 74.5 80-89 7 84.5 90-99 4 94.5 Use the grouped-data formulas to estimate the sample mean and sample standard deviation of the days-to-maturity data. The ages of 36 millionaires sampled are arranged in increasing order in the following table: 31 38 39 39 42 42 45 47 48 48 48 52 52 53 54 55 57 59 60 61 64 64 66 66 67 68 68 69 71 71 74 75 77 79 79 79 1. Determine the quarterlies for the data. 2. Obtain and interpret the interquartile range. 3. Find and interpret the five-number summary. 4. Calculate the lower and upper limits. 5. Identify potential outliers, if any. 6. Construct and interpret a boxplot. Construct Stem-and-leaf plot: 1. One line per stem 2. Two lines per stem 58 66 68 70 70 71 71 72 73 73 75 76 78 78 79 80 80 80 81 82 82 82 82 83 84 86 86 8686 86 87 88 89 89 89 90 92 93 95 97 Table 1: Scores on a Final Examination