Compute the 99% confidence interval for the dependent variable, for a selected value of the independent variable. Each student can choose a value to use for the independent variable (use same value in the next step). Interpret this interval.

Using the same chosen value for part (8), estimate the 99% prediction interval for the dependent variable. Interpret this interval.

SUMMARY OUTPUT
Regression Statistics
Multiple R	0.314879127
R Square	0.099148864
Adjusted R Square	0.089861739
Standard Error	8.019027668
Observations	99
ANOVA
	df	SS	MS	F	Significance F
Regression	1	686.5147486	686.5147486	10.67594795	0.001501591
Residual	97	6237.566059	64.30480474
Total	98	6924.080808
	Coefficients	Standard Error	t Stat	P-value	Lower 95%	Upper 95%	Lower 95.0%	Upper 95.0%
Intercept	17.5788728	7.465239038	2.354763553	0.020549211	2.762439793	32.39530581	2.762439793	32.39530581
Calls	0.149958873	0.045895377	3.267406916	0.001501591	0.058869254	0.241048492	0.058869254	0.241048492