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1.)A manufacturer knows that their items have a normally distributed length, with a mean of 12.9...

1.)A manufacturer knows that their items have a normally distributed length, with a mean of 12.9 inches, and standard deviation of 1.1 inches.

If one item is chosen at random, what is the probability that it is less than 14.9 inches long?

2.)A manufacturer knows that their items have a normally distributed lifespan, with a mean of 5 years, and standard deviation of 1.1 years.

If you randomly purchase one item, what is the probability it will last longer than 8 years?

3.)

A manufacturer knows that their items have a normally distributed length, with a mean of 12.9 inches, and standard deviation of 1.1 inches.

If one item is chosen at random, what is the probability that it is less than 14.9 inches long?

Math   Statistics-And-Probability   
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