Chapter 13 - Nonparametric Statistics - 13-2 Sign Test - Basic Skills and Concepts - Page 646: 5

There is a difference.

Since the sample size is 25 or less, the critical x values are found in the Table A-7: x=2 If the number of negative or positive signs is less than the critical value, then reject the null hypothesis: 1<2 -- Reject H0 There is sufficient evidence that there is a difference.