The sign test

Question 1

Sign test definition

Answer 1

Non- parametric test, used when you have nominal data and use a repeated measures design.

Question 2

How to conduct sign test

Answer 2

1. Find the number of the least occurring sign (S).
2. Look at the critical values table and use S and 0.05 to find the critical value.
3. S (calculated) must be equal to or less than the critical value to be significant.

Question 3

Finding critical value (stated value)

Answer 3

(Find number of PPs - no change columns), then use that number and significance level 0.05 in the critical values table

Question 4

Finding the calculated value (S) (value for sign)

Answer 4

Number of the least occurring sign

Question 5

Type 1 error

Answer 5

False positive. REJECTING the null hypothesis, when there is a chance that the results were DUE TO CHANCE.

Question 6

Type 2 error

Answer 6

False negative. ACCEPTING the null hypothesis, when there’s a chance the results WERE SIGNIFICANT.

Question 7

Significant difference

Answer 7

Can accept the hypothesis, reject null hypothesis