Binomial Sign Test

Question 1

Checklist

Answer 1

Nominal data
Repeated measures design
Test for difference

Question 2

Calculation steps

Answer 2

1. Compare the outcomes in condition a and condition b for each participant.
2. Count how many positive changes there have been and how many negative. No changes are ignored.
3. The smallest number is the calculated value of S.

Question 3

Critical value

Answer 3

Check critical value table based on 1-tailed/2-tailed hypothesis, significance level and N (don’t count 0 differences as part of N)

Question 4

Significance statement

Answer 4

If the calculated S value is less than or equal to the critical S value the result is significant = reject Null Hypothesis.
If the calculated S value is greater than the critical S value the result is not significant = accept Null Hypothesis.