Question

Scores on a common final exam in a large enrollment, multiple-section freshman course are normally
distributed with mean 72.7 and standard deviation 13.1.
a)Find the probability that the score X on a randomly selected exam paper is between 70 and 80.
b)Find the probability that the mean score of 38 randomly selected exam papers is between 70 and 80.

Answer 1

Answer:

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Step-by-step explanation:

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