Sign Test Statistics Formula. The null and alternative hypotheses for each type of test are as follows. The sign test involves denoting values above the median of a continuous population with a plus sign and the ones falling below the median with a minus sign in order to test the hypothesis that there is no difference in medians.
Given pairs of observations for each subject the sign test determines if one member of the pair tends to be greater than the other member of the pair. Add a fourth column indicating the sign of the number in column 3. Signs and the number of signs it is likely that the median is different from the hypothesized value and the null hypothesis should be rejected.
This function ignores any empty or non numeric cells.
No difference in median of the signed differences. Denote the total number of signs by n ignore the zero sign and the number of less frequent signs by s. X x is the critical value for the sign test for the significance level provided and the type of tails specified. 5 n 2 n 2.
