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Normal Probability-Reading Speed

The reading speed of second grade students in a large city is approximately normal, with a mean of 91 wpm and standard deviation of 10 wpm.

(a) What is the probability a randomly selected student in the city will read more than 95 wpm?
(b) What is the probability that a random sample of 11 second grade students from the city results in a mean reading speed of 95 wpm
(c) What is the probability that a random sample of 22 second grade students from the city results in a mean reading rate of 95 wpm

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Normal Probability-Reading Speed

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