[Solved]R Programming Dataset Package 1 Predictors Significant Alpha Level 005 Indus B Rad C Ptrat Q37112770

R programming. Dataset in package.

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1) Which of the predictors is NOT significant at an alpha levelof 0.05?

a) indus

b) rad

c) ptratio

d) stat

e) None of the above

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2) Record the R-squared. Now re-create the model, but remove allnon-significant predictors (again using an alpha of 0.05). What hashappened to the R-squared?

a) It has increased.

b) It has decreased.

c) It has stayed the same.

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3) The city is particularly interested in knowing thecorrelation between the proportion of residential land zoned forlots over 25,000 square feet and the proportion of non-retailbusiness acres per town. What does this correlation value tell youabout this relationship? (Hint: Use ?Boston to check thepredictors.)

a) There is no relationship between the two.

b) There is a positive correlation – the greater the proportionof zoned residential land, the greater the number of non-retailbusiness acres per town.

c) It is impossible to tell the correlation between these twofactors.

d) There is a negative correlation – the greater the proportionof zoned residential land, the fewer the non-retail business acresin that town.

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4) In an attempt to pinpoint demographic influences on medianvalues, you focus on the following factors: crim, ptratio, black,and lstat. Create a regression model with these variables as thepredictors and median value as the response. Which factor(s) aremost significant at an alpha level of 0.05?

a) lstat

b) ptratio and black

c) crim and lstat

d) ptratio and lstat

e) crim

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5) The city now wants to know what housing median values maylook like in the future based on the demographic influences youexamined. Using the linear regression you created in the firstquestion, predict the median housing value where the per capitacrime rate is 0.04, the average number of rooms per dwelling is 7,the full-value property-tax rate per /$10,000 is 278, thepupil-teacher ratio by town is 17.5, and the lower status of thepopulation by percent is 7.5. (Choose the closest possibleanswer).

a) 17.1866853

b) 22.3442123

c) 31.5587100

d) 27.2034097

e) 42.0319312

The Boston city government wants to hire you as a consultant to help determine the factors that influence housing values in the city. Armed with your knowledge of linear regression in R, you decide to earn your paycheck and accept the contract. Load the Boston library dataset from the MASS package, then create a linear regression with median home value as the response and all other factors as predictors Show transcribed image text The Boston city government wants to hire you as a consultant to help determine the factors that influence housing values in the city. Armed with your knowledge of linear regression in R, you decide to earn your paycheck and accept the contract. Load the Boston library dataset from the MASS package, then create a linear regression with median home value as the response and all other factors as predictors

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