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Cell phone cost is normally distributed with a mean of $83, and a standard deviation of...

Cell phone cost is normally distributed with a mean of $83, and a standard deviation of $16. For a randomly selected cell phone, find the following:

What is the probability that the cost is between $ 90 and $100?

What is the cost of the top 2% of users?

4. Do problem 1 for a sample of 10 cell phones.

Math   Statistics-And-Probability   
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