Estimate mean, median, variance and standard deviation
Financial planners often recommend international mutual funds to improve the overall performance of an investor's portfolio. The year's performance figures for U.S stock funds and for international stock are as follows, in percentages.
|
Year
|
U.S. Stock Funds (X)
|
International Stock Funds
|
|
1983
|
21.77
|
27.73
|
|
1984
|
-1.2
|
-4.71
|
|
1985
|
28.52
|
44.44
|
|
1986
|
14.53
|
41.4
|
|
1987
|
1.17
|
7.02
|
|
1988
|
15.75
|
17.43
|
|
1989
|
25.09
|
21.98
|
|
1990
|
-6.11
|
-12.07
|
|
1991
|
36.67
|
12.51
|
|
1992
|
9.11
|
-4.48
|
|
1993
|
9.17
|
25.65
|
a) Compute the mean, median, variance, standard deviation
b) Using part (a), explain to an investor the differences between the distributions of the performance figures for the two types of stock funds.