Instructions: Code problems and solve using R studio, when necessary.

*Note* First step always use the following example to lead data Example is GPA data is mentioned follow:

load("GPA.RData")

df

assign(df, data)

QUESTION 81

Ch7.C3 (iii).A model that allows major league baseball player salary to differ by position is:

log(salary)=?0?+ ?₁?years+ ?₂?gamesyr+ ?₃?bavg+ ?₄?hrunsyr+ ?₅?rbisyr+ ?₆?runsyr+ ?₇?fldperc+ ?₈?allstar+ ?₉?frstbase+ ?₁₀?scndbase+ ?₁₁?thrdbase+ ?₁₂?shrtstop+ ?₁₃?catcher+u

where outfield is the base group.

1.State the null hypothesis that, controlling for other factors, catchers and outfielders earn, on average, the same amount.

2. Test the null hypothesis that there is no difference in average salary across positions, once other factors have been controlled for (?frstbase, scndbase, thrdbase, shrtstop and catcher )

Are the results from parts (1) and (2) roughly consistent? (Select yes or no)

Yes

No

QUESTION 82

1. Ch 7 C1 (i) Use the data in GPA1 for this exercise. RegresscolGPAon PChsGPAandACT.what is the value of ?₀

QUESTION 83

1. Ch 7 C1 (i) Use the data in GPA1 for this exercise. RegresscolGPAon PChsGPAandACT.what is the coefficeinct for PC

QUESTION 84

1. Ch 7 C1 (i) Use the data in GPA1 for this exercise. Add the variablesmothcollandfathcollto the equation estimated in the Regression colGPAon PChsGPAandACT).Does the effect of PC ownership change significantly? (slect true or false)

True

False

QUESTION 85

1. Ch 7 C1 (i) Use the data in GPA1 for this exercise. when the variablesmothcollandfathcollare added to the equation estimated in the Regression colGPAon PChsGPAandACT).Is the effect of PC significant in the the resulting equation (Select true or False)

True False

QUESTION 86

1. Ch 7 C1 (ii) Use the data in GPA1 for this exercise. add the variablesmothcollandfathcollare added to the equation estimated in the Regression colGPAon PChsGPAandACT)

Test for joint significance ofmothcollandfathcollin the resulting equation what is the pvalue in this test?

QUESTION 87

1. Ch 7 C1 (ii) Use the data in GPA1 for this exercise. add the variablesmothcollandfathcollare added to the equation estimated in the Regression colGPAon PChsGPAandACT)

Test for joint significance ofmothcollandfathcollin the resulting equation

Are varaibles mothcollandfathcollabove jointly significant? (Select yes, or no)

Yes

No

QUESTION 88

1. Ch 7 C1 (iii) Use the data in GPA1 for this exercise. add the variablesmothcollandfathcollare added to the equation estimated in the Regression colGPAon PChsGPAandACT)

Add hsGPA2 to the estimated model above. Does this addition help validate the model (Select yes, or no)

Yes

No

QUESTION 89

1. Ch 7. C2 ( i)Use the data in WAGE2 for this exercise. Estimate the model:

log(wage) =?₀?+?_1?educ+?_2?exper+?₃tenure+?_4?married+?₅?black+?_6?south+?_7?urban+u

what is the R²value?

QUESTION 90

Ch 7. C2 ( i)Use the data in WAGE2 for this exercise. Estimate the model:

log(wage) =?₀?+?_1?educ+?_2?exper+?₃tenure+?_4?married+?₅?black+?_6?south+?_7?urban+u

Match the coefficients from the estimated equation;

# Po A. 5.40 B. 0.184 C. 0.091 D. 0.0654 E. 0. 188 F. 0.199 $ 86 G. 0.0140 H. 0.0117