Sign test

Question 1

What is the basic definition of the sign test ?

Answer 1

A statistical test to determine the significance of a sample of related items

Question 2

When do you use the sign test ?

Answer 2

• When looking at paired/ related data
• Repeated measures design
• Matched pairs

Question 3

How do you do the sign test before the critical period ?

Answer 3

Step 1: Work out if the hypothesis is one-tailed or two-tailed
Step 2: Record on the table if a equals, positive or negative sign is needed
Step 3: Count how many of each there is
Step 4: Find ‘s’ which is the least frequent value out of the positive or negative
Step 5: Find ‘n’ which is the number of participants which had a positive or negative sign

Question 4

What is the critical value table and how do you use it ?

Answer 4

• This table stays the same
• First you have to know if your hypothesis is one or two tailed
• always use the 0.05 hypothesis level of significance
• Identify the n value
• identify the critical value n
• S needs to be equal to or less than the critical value to be significant

Question 5

How do you report it ?

Answer 5

• if a result is significant, the researcher accept the alternate hypothesis and rejects the null hypothesis
• If the result is not. significant, the researcher accepts the null hypothesis and rejects the alternate hypothesis