# Question

Each of the following pairs represents the number of licensed drivers (X) and the number of cars (Y) for seven houses in my neighborhood:

DRIVERS ( X ) CARS ( Y )

5.............. 4

5.............. 3

2.............. 2

2.............. 2

3.............. 2

1.............. 1

2.............. 2

(a) Construct a scatterplot to verify a lack of pronounced curvilinearity.

(b) Determine the least squares equation for these data. (Remember, you will first have to calculate r, SSy , and SSx.)

(c) Determine the standard error of estimate, sy | x , given that n 5 7.

(d) Predict the number of cars for each of two new families with two and five drivers.

DRIVERS ( X ) CARS ( Y )

5.............. 4

5.............. 3

2.............. 2

2.............. 2

3.............. 2

1.............. 1

2.............. 2

(a) Construct a scatterplot to verify a lack of pronounced curvilinearity.

(b) Determine the least squares equation for these data. (Remember, you will first have to calculate r, SSy , and SSx.)

(c) Determine the standard error of estimate, sy | x , given that n 5 7.

(d) Predict the number of cars for each of two new families with two and five drivers.

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