Graph these data. Does it appear that there is a linear relationship between body weight and heart rate at rest?
Compute β ̂_0 and β ̂_1 and weight the regression equation for these data. Plot the regression line on the graph from Part (a). Interpret the estimated regression coefficients.
Now examine the data point (67,40) . If this data point were removed from the data set, what changes would occur in the estimates of β_0 and β_1 ?
Obtain the point estimate of the mean of Y when X = 88. Obtain a 95% confidence interval estimate of the mean of Y when X = 88. Interpret this interval statement.
Predict the heart rate for a particular subject weighing 88kg using both a point prediction and a 95% confidence interval. Compare these predictions to the estimates computed in Part (d).
Without doing the computations, for which measured X would the corresponding Y ̂ have the smallest variance? Why?