Based on a sample of 25 observations, the population regression model,yi = ?0 + ?1×1 + ?i,was estimated. The least squares estimates obtained were as follows:,b0 = 15.6 and b1 = 1.3,The total and error sums of squares were as follows:,SST = 268 and SSE = 204,a. Find and interpret the coefficient of determination.,b. Test, against a two-sided alternative at the 5% significance level, the null hypothesis that the slope of the population regression line is 0.,c. Find a 95% confidence interval for ?1.

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