QUESTION 10 1. Data Set 15-1 The scores below are ranks. They were obtained by taking each raw score and giving it a rank of 1 to 4. Group 1 Group 2 3 2 4 Refer to Data Set 15-1. The rationale of nonparametric tests says that if the null hypothesis is true, O a. the sum of the ranks of those in Group 1 will not be equal to the sum of those in Group 2 O b. the mean score of the population from which Group 1 comes will not be equal to that of Group 2 O & the mean score of the population from which Group 1 comes will be equal to that of Group 2 O d. the sum of the ranks of those in Group 1 will be equal to the sum of those in Group 2