Answer
a. see the plot.
b. $r=0.907$
c. The correlation coefficient is significant at $\alpha=$0.01
d. $y = 3.4076x + 102.85$
e. see the plot.
f.$6918$
Work Step by Step
a. Draw the scatter plot.
see the plot.
b. Compute the value of the correlation coefficient.
$r=0.907$
c. Test the significance of the correlation coefficient at $\alpha=$0.01, using Table I.
$df=5, r_c=0.875, |r|>r_c$, the correlation coefficient is significant at $\alpha=$0.01
d. Determine the regression line equation if r is significant.
$y = 3.4076x + 102.85$
e. Plot the regression line on the scatter plot, if appropriate.
see the plot.
f. Predict y for a specific value of x, if appropriate.
$y = 3.4076\times2000 + 102.85=6918$
