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In the population of typical college students, = 75 on a statistics final exam (x = 6.4). For 25 students who studied statistics using a

In the population of typical college students, = 75 on a statistics final exam (x = 6.4). For 25 students who studied statistics using a new technique, = 72.1. Using two tails of the sampling distribution and the .05 criterion: (a) What is the critical value?

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