A data set is given below.

(a) Draw a scatter diagram. Comment on the type of relation that appears to exist between x and y.

(b) Given that x = 3.6667, sx = 2.2509, y = 3.9167, sy = 1.6461, and r= -0.9428, determine the least-squares regression line.

(c) Graph the least-squares regression line on the scatter diagram drawn in part (a).

A.

Ау

7-

0+

A.

Ау

7+

X

y

0

1

1

4

4

6

6

5.0 6.3 4.4 3.5 2.0 2.3

There appears to be a linear, negative relationship.

(b) ŷ = x + (

(Round to three decimal places as needed.)

(c) Choose the correct graph below.

X

6

B.

X

7

B.

Ay

7-

0-

0

●

■■

6

6

X

X

C.

Ay

7-

7-

0-

0

y

Vi

6

6

X

X

(1)

More

D.

Ay

7-

D.

7-

0-

0

y

●

6

Next