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Wednesday, 28 September 2016

Cars & Transportation: Commuting: “Question: Statistics question PLEASE HELP!!?” plus 5 more

Cars & Transportation: Commuting: “Question: Statistics question PLEASE HELP!!?” plus 5 more


Question: Statistics question PLEASE HELP!!?

Posted: 27 Sep 2016 07:27 PM PDT

We expect a car's highway gas mileage to be related to its city gas mileage (in miles per gallon, mpg).
Data for all 1137 vehicles in the government's 2013 Fuel Economy Guide give the regression line
highway mpg = 6.785 + (1.033 × city mpg)

for predicting highway mileage from city mileage.

What is the slope of this line?

Say in words what the numerical value of the slope tells us.
A. On the average, highway mileage decreases by 1.033 mpg for each additional mpg in city mileage.
B. For every 6.785 mpg in city gas mileage, highway gas mileage increases about 1.033 mpg.
C. On the average, highway mileage increases by 1.033 mpg for each additional mpg in city mileage
D. On the average, highway mileage increases by 6.785 mpg for each additional mpg in city mileage.
E. Highway gas mileage increases with city gas mileage by 6.785 mpg for each additional mpg in city mileage.

What is the intercept?

Explain why the value of the intercept is not statistically meaningful.

Find the predicted highway mileage for a car that gets 16 miles per gallon in the city.

Question: How much should training cost after passing the written test for class a cdl?

Posted: 27 Sep 2016 05:51 PM PDT

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