PROBABILITY

Question

A statistics professor plans classes so carefully that the lengths of her classes are uniformly distributed between 49.0 and 54.0 minutes. Find the probability that a given class period runs between 51.25 and 51.5 minutes.

Answer 1

The mean is 51.5 minutes. Do we know what the Standard Deviation is? We need that (σ) in order to calculate z scores, from which we can determine areas under the standard normal curve, and thus answer this question.