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In: Statistics and Probability

Multiple Regression:  A rental property owner in a midsized town of Appleton wants to determine the appropriate...

  1. Multiple Regression:  A rental property owner in a midsized town of Appleton wants to determine the appropriate rent to charge in a new apartment complex and therefore wants to model the relationship between property Rent (Y)in dollars, the number of Bedrooms(x1), Square foot(x2) area of each apartment and whether the apartment comes with a Dishwasher(x3). Dishwasher is coded using a dummy variable that takes the value of 1 if the apartment comes with a dishwasher and 0 if it doesn’t. Using a random sample ofn = 60apartments in the area the owner obtains the following regression output. (15 points)

Model:   Y = b0+ b1Bedrooms+b2Sqft+ b3Dishwasher Dummy+e

Dishwasher Dummy 1   if Dishwasher included
                                   0   Otherwise

            

SUMMARY OUTPUT

Dependent Variable: Apartment Rent ($)

Regression Statistics

Multiple R

0.824

R Square

0.678

Adjusted R Square

0.661

Standard Error

92.757

Observations

60

ANOVA

df

SS

MS

F

Significance F

Regression

3

1015955.29

338651.76

39.36

8.11272E-14

Residual

56

481813.65

8603.82

Total

59

1497768.93

Coefficients

Standard Error

t Stat

P-value

Lower 95%

Upper 95%

Intercept

216.402

44.797

4.831

0.000

126.664

306.141

Bedrooms

59.936

27.504

2.179

0.034

4.838

115.033

Square feet area

0.276

0.069

3.981

0.000

0.137

0.415

Dishwasher

50.00

20.923

2.389

0.047

65.000

85.000

  1. Write the equation for the regression equation in terms of the variables and the estimated coefficients? (include the t-stat below each coefficient value).
  1. The value of R2 and adjusted R2, measure the goodness of fit of the model. Which is the appropriate estimate to use for multiple regression analysis? Explain what it means.
  1. Given that Rent is measured in dollars, interpret the relationship between (a) number of Bedrooms and Rent and (b) Dishwasher and Rent. (Give your answerin the correct units)
  1. Use the estimated equation in (A) to predict the Rent on a 2 Bedroom apartment, with 915 sqft area.
    1. With no Dishwasher
  1. With Dishwasher
  1. Conduct a test of hypothesis using a= 0.05, forb1, b2and b3. Compare the model t-stats for each independent variable against the critical t-valuefor a 2-sided test and determine if the variable is significant in explaining home price.

                                          H0:

                                          HA:

            

Criticalt-value=

                        Show on a graph:

  1. Use the t-statsfrom the Excel output to determine if you should accept or reject the H0forb1,b2andb3.

Are number of bedrooms significant in explaining apartment Rent? Square Feet Area?  

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