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# Normal Probability : key information

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Let's assume you have taken 100 samples of size 36 each from a normally distributed population. Calculate the standard deviation of the sample means if the population's variance is 25.

Find P(9 < x < 15) when mu = 12 and sigma = 2. Write your steps in probability notation.

Find P(x = 13) for a sample taken from a normally distributed population with mu = 15 and sigma = 3.

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#### Solution Preview

need detailed explanations in word...fast
1. Let's assume you have taken 100 samples of size 36 each from a normally distributed population. Calculate the standard deviation of the sample means if the population's variance is 25.

Standard deviation of sample means with ...

#### Solution Summary

The solution gives the details for computing normal probability for different events.

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