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Use Auto MPG data file. Unit of analysis in this dataset is an individual car (n = 398). Delete all rows that have a missing value on horsepower. The resulting final sample size should be 392. Answer questions in the sequence in which they are presented. Variable definitions are as follows: id: unique car ID mpg: miles per gallon (fuel efficiency) cylinders: number of cylinders displacement: engine displacement (in cubic inches) horsepower: engine horsepower weight: vehicle weight (in lbs.) acceleration: time to accelerate from 0 mph to 60 mph (in seconds) model_year: model year car_name: car name Construct a scatter plot with mpg on the Y axis and horsepower on the X axis. This scatter plot suggests that there is ________________ relationship between the two variables.

		Negative
		Positive
		Both positive and negative
		No

Construct a scatter plot with mpg on the Y axis and acceleration on the X axis. This scatter plot suggests that there is ________________ relationship between the two variables.

		Both positive and negative
		Negative
		Positive
		No

Estimate a simple linear regression model that predicts mpg (Y) from horsepower (X). The R-square in this model equals _____.

		17.92%
		0.61%
		60.59%
		0.18%