Finding a uniform distribution probability using StatCrunch

Intro

Howdy!  I’m Professor Curtis of Aspire Mountain Academy here with more statistics homework help.  Today we’re going to learn how to find a uniform distribution probability using StatCrunch.  Here's our problem statement: A statistics professor plans classes so carefully that the lengths of her classes are uniformly distributed between 49.0 and 59.0 minutes.  Find the probability that a given class runs between 50.25 and 50.75 minutes.

Solution

OK, so to do this, I open up StatCrunch.  Notice there’s no icon here in the problem for you to do that with.   That’s why I always love to keep a separate window with StatCrunch open and available so that I can have access to it if I need to.  We need the uniform distribution calculator, so to get there I click on Stat –> Calculators –> Uniform.  The next thing you need to do is put in my lower and upper limits, and those are given to me here in the problem statement — the 49 and 59.   I put those in here.  And then we want to find a probability in between two points here, so I go up and select the Between option.  And now I put in the lower and upper limits for that section.  I want to look for once it is that a first computer probability 5% but tested it and that's all there is to it.

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