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Question 2 (total 5 Points) Does delaying oral practice hinder learning a foreign language? Researchers randomly assigned 23 beginning students of Russian to begin speaking practice immediately and another 23 to delay speaking for 4 weeks. At the end of the semester both groups took a standard test of comprehension of spoken Russian. Suppose that in the population of all beginning students, the test scores for early speaking vary according to the N (32, 6) distribution and scores for delayed speaking have the N (29, 5) distribution. a. (2 points) What is the sampling distribution of the mean score X" in the early speaking group? What is the sampling distribution of the mean score )7 in the delayed-speaking group? b. (1 point) What would be the sampling distribution of the difference I7 2? between the mean scores in the two groups? c. (2 points) What is the probability that an experiment will nd (misleadingly) that the mean score for delayed speaking is at least as large as that for early speaking