Question

The following ANOVA was created to predict the attendance to a weekly summer concert. The variables used to predict the attendance are the temperature forecast for the day of the concert and if a TV ad was run that week (TV Ad Run=1 if it was run and 0 if not).

ANOVA
	df	SS	MS	F	Significance F
Regression	2	644377	322189	48.2	1.22E-09
Residual	27	180320	6679
Total	29	824697
	Coefficients	Standard Error	t Stat	P-value	Lower 95%	Upper 95%
Intercept	304.7	117.22	2.60	0.015	64.2	545.2
Forecast Temp	13.4	1.39	9.65	3.04E-10	10.5	16.2
TV Ad Run	150.2	31.67	4.74	6.09E-05	85.2	215.2

When the TV ad is run, attendance at the concert...

	A) Is 150 plus 13.4 times the forecast temperature.
	B) Is 305 plus 13.4 times the forecast temperature.
	C) Increases by 150 people.
	D) Decreases by 150 people.

Answer 1

Ans:

In regression with multiple independent variables, the coefficient tells you how much the dependent variable is expected to increase when that independent variable increases by one, holding all the other independent variables constant.

As,the slope cofficient for TV ad run is 150.2,it indicates that when Tv ad is run,attendence at the concert increases by 150 people(as slope cofficient is positive).

Option C is correct(increases by 150 people)