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A sample of size 8 will be drawn from a normal population with mean 61 and...

A sample of size 8 will be drawn from a normal population with mean 61 and standard deviation 14.

(a) Is it appropriate to use the normal distribution to find probabilities for x?

(b) If appropriate find the probability that x will be between 51 and 71. Round the answer to four decimal places.

(c) If appropriate find the 81st percentile of x.

Round the answer to two decimal places.

Math   Statistics-And-Probability   
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