Use of the Sign Test

Question 1

What is the purpose of Statistical Testing?

Answer 1

A way of determining whether hypotheses should be rejected or accepted
Tell us if relationships between variables are statistically significant or due to chance

Question 2

When can the Sign test be used?

Answer 2

If the study looks for a difference not an association
Repeated measures
Nominal data

Question 3

What are the 2 columns data from the original table should be put into?

Answer 3

1) Difference between condition 1 and 2
2) Sign of the difference (+ or -)

Question 4

How is the Sign (S) calculated?

Answer 4

Adding up the number of the least frequent sign

Question 5

How is N calculated?

Answer 5

Number of signs in total (excluding 0)

Question 6

How do we test the significance of the findings?

Answer 6

On the sign table-
1) Look for N= (answer)
2) Then find where S= (answer)
3) Read number in P column

Question 7

What will the P value be if the findings are significant?

Answer 7

Less than alpha (0.05)

Question 8

What does alpha represent?

Answer 8

Probability of obtaining results due to chance

Question 9

What does it mean if the P value is bigger than 0.05?

Answer 9

Reject hypothesis and accept null hypothesis

Question 10

What does it mean if the value is less than 0.05?

Answer 10

Reject null hypothesis