Kebri LTD. sells Radios and Televisions. They have recorded their monthly revenue as follows.

Revenue(Y)	330	180	209	390	391	304	347	461	538	610
Radio units (X1)	55	71	92	113	134	156	171	193	219	232
Television Units (X2)	63	120	151	73	42	81	93	103	124	145

(i) Estimate the regression equation of Revenue on Radio units and Television units.

(ii) Construct a 98% confidence interval for Revenue if Radio units sold is 300 and Television units sold is 250.

(iii) Comment on the significance of the regression model at a 1% significance level.

(iv) Test at 5% significance level whether Radio sales and Television sales are significant predictors of Revenue.

(v) Test for autocorrelation using the Durbin-Watson statistic. (Assume DL = 1.25 and DU = 1.7)

Answer rating: 100% (QA)

i The regression equation is Y 330 055X1 063X2 ii The confidence interval is Y 330 055300 063250 Y ... View the full answer