The data in Table 8.11 were considered by Gentry and Pike (1970) in their study of the relationship between the mean rate of return over the period 1956 through 1969 and the 1969 value of common stock portfolios for 32 life insurance companies.
Test the hypothesis of independence versus the general alternative that the 1956-1969 mean rate of return for a stock portfolio is correlated in some fashion with its 1969 value.
