PSYC 2317 EXAM 1

1. A. Create a frequency distribution with the following data:

12 13 14 12 11 15 12 13 17 12

10 12 12 11 12 15 13 17 19 12

X f cum f p % cum%

19 1 20 .05 5 100

18 0 19 0 0 95

17 2 19 .10 10 95

16 0 17 0 0 85

15 2 17 .10 10 85

14 1 15 .05 5 75

13 3 14 .15 15 70

12 8 11 .40 40 55

11 2 3 .10 10 15

10 1 1 .05 5 5

B. Find the , Md, Mo, SS, 2 , .

= 13.2

Md= 12

Mo= 12

SS= 101.2

2

= 5.06

= 2.25

C. Find the M, Md, Mo, SS, s 2

and s.

M= 13.2

Md= 12

Mo= 12

SS= 101.2

s 2

= 5.33

s= 2.31

D. Convert the scores to a distribution with a mean of 45 and standard deviation of 5 using the data

from A. and B.

Old X z New X

19 2.58 57.90

18 2.13 55.65

17 1.69 53.45

16 1.24 51.20

15 .80 49.00

14 .36 46.80

13 -.08 44.60

12 -.53 42.35

11 -.98 40.10

10 -1.42 39.70