Sign Test

Question 1

what is the first step of the sign test?

Answer 1

write suitable alternative and null hypotheses of the investigation

Question 2

what is the second step of the sign test?

Answer 2

work out the sign
- + or -

Question 3

what is the third step of the sign test?

Answer 3

find the calculated value
- calculated value = S
- S is found by adding all the +s and -s and whichever there is fewer of this is the S value

Question 4

what is the fourth step of the sign test?

Answer 4

• find the critical value
• N = number of ppts(any difference of 0 should be removed)
• our hypothesis was directional/non-directional so we use a one-tailed test/ two-tailed test

Question 5

what is the end conclusion of the sign test?

Answer 5

• if the calculated value is less than or equal to the critical value then the results are significant
• accept / reject the null/alternative hypothesis