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Below are results of a regression of Y = average stock returns (in percent) as a function of X = average price/earnings ratios for the period 1949-1997 (49 years). Separate regressions were done for various holding periods (sample sizes are therefore variable). (a) Summarize what the regression results tell you. (b) Would you anticipate autocorrelation in this type of data? Explain. (Data are from Ruben Trevino and Fiona Robertson, "P/E Ratios and Stock Market Returns," Journal of Financial Planning 15, no. 2 [February 2002], p. 78.)
Holding Period
Intercept
Slope
t
R 2
p
1-Year
28.10
-0.92
1.86
.0688
.0686
2-Year
26.11
-0.86
2.57
.1252
.0136
5-Year
20.67
-0.57
2.99
.1720
.0046
8-Year
24.73
-0.94
6.93
.5459
.0000
10-Year
24.51
-0.95
8.43
.6516
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statistical abstracts 117th edition reports that the average amount spent annually for food by householders under 25
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