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A professor gives an exam for which there are two versions, A and B. Each student in the class is given one randomly selected version of the exam. After the exam, the professor wishes to determine if there is a difference in the level of difficulty of the two versions by determining if there is a significant difference in the mean scores. Assume ? = 0.05.

Version A Version B

Sample size 45 65

Mean score 8.8 8.2

Sample variance 2.6 2.4

What is the test value for this hypothesis test?

Answer=

What is/are the critical value(s) for this hypothesis test? If there are two critical values, give only the positive value.

Answer=

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Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M91008058

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