A sample of 70 women is obtained and their heights in inches

A sample of 70 women is obtained, and their heights (in inches) and pulse rates (in beats per minute) are measured. The linear correlation coefficient is 0.234 and the equation of the regression line is y=18.1+0.860x, where x represents height. The mean of the 70 heights is 63.4 in and the mean of the 70 pulse rates is 75.9 beats per minute. Find the best predicted pulse rate of a woman who is 65 in tall. Use a significance level of =0.01.

The best predicted pulse rate of a woman who is 65 in tall is __ beats per minute.

Solution

As

y=18.1+0.860x

Then as = 65, then

y=18.1+0.860*65 = 74 [ANSWER]

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For this problem, the other givens do not matter [yet].