STAT200 Week 7

13. Consider the data.

Find y-predicted when x = 30.

(a) Draw the scatter plot for the variables.

Use Excel or other program. Copy/paste in a Word file. 

(b) Compute the correlation coefficient. Use three decimal places.

Use technology. If you use the formula do not show me the computations.

(c) Find the equation of the regression line.

(d) Find the predicted y-value for the specified x-value.

(e) Test r for statistical significance using α = 0.05.

STAT200 Week 7 Solution

The test statistic = r*√((n-2)/(1-r^2 ))=0.8611*√((7-2)/(1-〖0.8611〗^2 )) = 3.787
Df = n-2 = 7-2 = 5
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Mann22443

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