Exercise 7.8

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)

5

5

2

2

3

1

2

CARS (Y)

4

3

2

2

2

1

2

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

There is not a 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 = 7.

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

I am stuck in this question, how do I solve this?