Q1) Financial planners often recommend international mutual funds to boost overall performance of the investor's portfolio. Year's performance figures for U.S stock funds and for international stock are given, 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 mean, median, variance, standard deviation
b) Using part(a), explain to investor differences between distribution of performance figures for the 2 kinds of stock funds.