Binomial Sign Test

Question 1

Checklist for binomial sign test:

3

Answer 1

• nominal data produced (types of categories)
• repeated measures design
• exploring a difference

Question 2

How to carry out this test (stages):

Answer 2

1. First column (participant no.), second column (condition A), third column (condition B)
2. Add a fourth column at the end (flow of direction). If hypothesis suggests condition A is more likely than Condition B, a YES in condition A is a +
   A NO in condition A is a -
   Ignore doubles (if 2 out of 10 pps have doubles, you now have 8pps).

3.Find total of - signs and then total of + signs
(Smallest total out of -/+ is the observed value)
4. Find critical value (8pps and 0.05 level of significance)
5. If observed value > than critical
Results are not significant
ACCEPT NULL

Question 3

If the critical value is is bigger than the observed value, are the results significant?

Answer 3

Yes, reject null.

Question 4

What happens if both of the conditions have produced a double/ same set of results (yes,yes)?

Answer 4

Ignore them, take out this pps from the total of pps (they should not be included in sample anymore)