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), describe to an investor the differences between the distributions of the performance figures for the two types of stock funds.