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Finding a uniform distribution probability using StatCrunch

9/3/2018

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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.

And that's how we do it at Aspire Mountain Academy.  Be sure to leave your comments below and let us know how good a job we did or how we can improve.  And if your stats teacher is boring or just doesn't want to help you learn stats, go to aspiremountainacademy.com, where you can learn more about accessing our lecture videos or provide feedback on what you’d like to see.  Thanks for watching!  We’ll see you in the next video.
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    Frustrated with a particular MyStatLab/MyMathLab homework problem?  No worries!  I'm Professor Curtis, and I'm here to help.

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