The sign test

Question 1

When would someone use the sign test?

Answer 1

When looking for a difference, repeated measures design and nominal data

Question 2

What are the 6 steps to work out the significance of the sign test?

Answer 2

1- Is the hypothesis one or two tailed?
2- workout the sign for each difference (+ or -)
3- Calculate value of S (the lowest number of occurring signs (if there are 3 +’s and 10 -‘s, S=3))
4- Calculate value of N (number of scores, discount the nil scores)
5- Find critical value (use the table)
6- Determine whether the results are significant (usually if the calculated S value is equal to or less than the critical value)
7- Report the conclusion