Question 1 In which of the following situations would a t test for independent means be conducted? 0 A comparison of the test scores from a group of students that has studied for a test using university tutoring services and the test scores from the same group of students from before they began studying D A comparison of the test scores from a group of students that has completed a special summer program designed to boost yocabulary to the test scores of the population of students in general 0 A comparison of a group of participants' pre-test and post-test scores from before and after their completion of a training program intended to increase their memory 0 A comparison of the musical ability test scores from a group of students that has been taught with a new style of teaching and the music ability scores of another group that has been taught with the old style of teaching Question 2 2 pts For the following problem, please round to two decimal places: A social psychologist interested in cultural differences compared women of two ethnic groups on a Role Approval Index on which high scores indicated high degrees of approval of one's own social role. The results were as follows. Ethnic Group A: N = 12, M = 56; Ethnic Group B: N = 13, M = 51 If the standard deviation of the distribution of the difference between means is 1.8, what is the t score?Question 3 A professor is interested in how a new kind of study guide would affect exam scores. In her class of 20 students, she gives 112! randomly selected students the new study and the remaining 10 students the old study guide for an upcoming exam. She aen conducts an independent samples ttest on their exam scores. What is the null hypothesis? (:1 The students with the new study guide wlll perform better on the exam D The students with the old study guide will perform worse on the exam (:1 There will he no difference In the exam performances of the two groups C: The students with the old study guide will perform better on the exam