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A sample of size 15will be drawn from a population with mean 135 and standard deviation...

A sample of size 15will be drawn from a population with mean 135 and standard deviation 36

.

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

(b) If appropriate find the probability that X will be less than 118

.

(c) If appropriate find the 90th  percentile of x

A sample of size 15will be drawn from a population with mean 135 and standard deviation 36

.

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

(b) If appropriate find the probability that X will be less than 118

.

(c) If appropriate find the 90th  percentile of x

Math   Statistics-And-Probability   
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