the mean attention span for adults in a certain village is 15 minutes, with a standard deviation of 6.4. what is the probability of randomly selecting a sample of 30 scores which has a mean attention span equals to or greater than 17 minutes?
the mean attention span for adults in a certain village is 15 minutes, with a standard deviation of 6.4. what is the probability of randomly selecting a sample of 30 scores which has a mean attention span equals to or greater than 17 minutes?
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