the sign test

Question 1

when to use the sign test?

Answer 1

• test of difference
• related design (repeated measures or matched pairs)
• nominal data

Question 3

method

Answer 3

1. is the hypothesis directional or non-directional
2. find the sign: record each pair of data with a + or - (if the difference is positive or negative), if there’s no difference, a nil sign 0 is recorded
3. calculate the value of S: add the total number of plusses and minuses and select the smaller value
4. calculate the value of N: the total number of scores, minus any nil scores
5. find the critical value
6. determine if the results are significant or not: S must be less than or equal to the critical value
7. draw a conclusion