A regression model with K = 16 independent variables is fit using a panel of sevenyears of data. The sums of squares for the seven separate regressions and the pooled regression are shown below. The model with the pooled data allows a separate constant for each year. Test the hypothesis that the same coefficients apply in everyyear.

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Observations c'e 1954 65 104 1955 55 88 1956 87 206 1957 95 144 1958 103 199 1959 87 308 1960 78 211 All 570 1425