help me please.
3-26.The following data reflect the number of times a population of business executives flew on business during the previous month:
4
6
9
4
5
7
a.Compute the range for these data. b.Compute the variance and standard deviation c. Assuming that these data represent a sample rather than a population, compute the variance and standard deviation.Discuss the difference between the values computed here and in part b
3-30. Consider the following two separate samples:
27 and 1
27
25
12
15
10
20
37
31
35
3
2
16
18
16
16
4
16
118
a.Calculate the range,variance,standard deviation and interquartile range for each data set b. Which data set is more spread out based on these statistics? c. Now remove the largest number from each data set and repeat the calculations called for in part a. d. Compare the results of parts a and c. Which statistic seems to be more affected by outliers?