Statistics

Statistics

A.2 Homework Set Solutions

1.

See table below.

2

2

Subject

Hours, x

Amount, y

A

3

48

144

9

2304

B

0

8

0

0

64

C

2

32

64

4

1024

D

5

64

320

25

4096

E

8

10

80

64

100

F

5

32

160

25

1024

G

10

56

560

100

3136

H

2

72

144

4

5184

I

1

48

48

1

2304

Totals

36

370

1520

232

19236

Exercise vs. Milk Consumption

80

60

40

20

Amount of Milk, y

0

0

3

5

8

10

13

Hours, x

2. 3. 4. 5. 6. 7. 8. 9.

= 0.0672

This is a very weak positive relationship between the variables.

̂ = 38.38 + 0.68

48.58

16

13. 14. 15. 16. 17.

60 42

456,976

336

84 81

30420

10. 11. 12.

792

67,600

120

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