Find the sample correlation coefficient for the following data. Select one:7291 b.8736 c.9118 d.9563 Find the slope of the simple regression = b 0 +...

Find the sample correlation coefficient for the following data.

Select one:

a. .7291

b. .8736

c. .9118

d. .9563

Find the slope of the simple regression  = b0 + b1x.

Select one:

a. 2.595

b. 1.109

c. -2.221

d. 1.884

If the residuals from a fitted regression violate the assumption of homoscedasticity, we know that:

Select one:

a. they are normally distributed.

b. they are independent of one another.

c. their variance is not constant.

d. there are extreme outliers.

A fitted regression Profit = -570 + 30 Sales (all variables in thousands of dollars) was estimated from a random sample of 20 pharmacies. For a pharmacy with Sales = 10, we predict that Profit will be:

Select one:

a. 3570.

b. 2430.

c. -270.

d. 870.

Interpret the slope of the fitted regression Homeprice = 125,000 + 150 SquareFeet.

What is the prediction for HomePrice if SquareFeet = 2,000?

Answer:

Moviegoer Spending on Snacks (n = 10 persons)

Age (X)Spent (Y)

30    6.85

50    10.50

34     5.50

12     10.35

37     10.20

33      10.75

36     7.60

26    10.10

18    12.35

46      8.35

Use instructions from your Regression book to run a regression in Excel. What is the regression equation? 

What is the slope?

Interpret the slope.

What is R2?

Interpret the R2.