Sign Test

SIGN TEST

if it is a directional hypothesis then it requires a one tailed test

step 1: state the hypothesis

if it is a non-directional hypothesis then a two tailed test is used

(+/

Step 2: Record the data and work out the sign (+/-)

Step 3: Find the calculated value

s is the symbol for the test statistic we are calculated

it is calculated by adding up all the pluses and adding up all the minuses then selecting the smallest value

Step 4: find the critical value of S

must be equal to or less than the critical value

Step 5 : is the result in the right direction

Step 6: Report the conclusion