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Suppose that the age of a car in the United States is normally distributed with a...

Suppose that the age of a car in the United States is normally distributed with a mean of 6.3 years and a standard deviation of 0.8 years.

- Draw and label a normal distribution curve representing this distribution (do not use the standard normal with z−scores) Clearly label the values corresponding to 1, 2 and 3 standard deviations from the mean.

- What is the probability that a randomly selected car from this population is over 5 years old? Shade an area corresponding to this probability on a normal distribution curve (make a new one) - Find the age of a car at the 80th percentile.

Math   Statistics-And-Probability   
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