(1 point) The table below shows the IQ of ten students and the number of hours o

Question

(1 point) The table below shows the IQ of ten students and the number of hours of TV each watches per week IQ 110 105 120 140 100 125 130 105 115 110 TV 10 12 10 1 14 12 4 7 15 2 (a) Use a calculator or computer to find the least squares regression line, y mz b where the dependent variable y denotes the number of hours of TV watched as a function of IQ, zl Enter the equation for the line below. (b) What is the correlation coefficient of the regression line? (Enter n accurate to at least three decimal places)

Explanation / Answer

For the first equation,using calculator we will get

y=32.222-.203x And the correlation coefficient is r=-.516

To find the value of coorelation coefficient r,we need summation x,summation y, summation(x*y),summation of x^2 and summation of y^2

And then we can use the formula of correlation coefficient

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