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8_Problem_Set

# 8_Problem_Set - c Use the results of(a and(b(the numbers...

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Book PS #8 #1) An experiment on the teaching of reading compares two methods, A and B. The response variable is the Degree of Reading Power (DRP) score. The experimenter uses Method A in a class of 26 students and Method B in a comparable class of 24 students. The classes are assigned to the teaching methods at random. Suppose that in the population of all children of this age the DRP score has the N(34, 12) distribution if Method A is used and the N(37, 11) distribution if Method B is used. a) What is the distribution of the mean DRP score x for the 26 students in the A group? (Assume that this group can be regarded as an SRS from the population of all children of this age.) (Round your answers to five decimal places if necessary.) b) What is the distribution of the mean score y for the 24 students in the B group? (Round your answers to five decimal places if necessary.)
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