Psych 101: Introductory Psychology Lab

Sign Test of Statistical Significance

Remember, the chart for Sign Test of Statistical Significance on page 50 of your manual is wrong. The correct chart is as follows:

Number of Plus Signs required when the direction of difference is predicted (one-tailed test)

(subtract 1 from N for each tie)

Sample Size (N)

5%

1%

5

5

5

6

6

6

7

6

7

8

7

8

9

8

9

10

8

9

11

9

10

12

9

11

13

10

11

14

10

11

15

11

13

16

11

13

17

12

14

18

13

14

19

14

15

20

14

16

21

15

16

22

15

17

23

16

18

24

17

18

25

17

19