Question: 1. In fitting a least squares line ton= 20data points, the following quantities were computed:ni=1(xix)2= 83,ni=1(yiy)2= 198ni=1(xix)(yi) =108,x = 2.3, andy = 35. (a) Find

1. In fitting a least squares line ton= 20data points, the following quantities were computed:ni=1(xix)2= 83,ni=1(yiy)2= 198ni=1(xix)(yi) =108,x = 2.3, andy = 35.

(a) Find the least squares line

(b) Graph the least squares line and specify the slope and intercept in the graph.

(d) Calculate sample variance of error terms.

(e) Find a 95% confidence interval for the slope. Interpret this estimate. (f) Find a 90% prediction interval for y when x = 15.

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