Aʙᴏᴜᴛ Tʜɪs Vɪᴅᴇᴏ – This video looks at the inverse normal distribution function which enables you to find X values, given that you know the probabilities. The inverse feature makes reference to the Area under the normal distribution graph which represents the probability from the Normal cumulative distribution.

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Aʙᴏᴜᴛ Tʜɪs Vɪᴅᴇᴏ – Using the Normal Cumulative Distribution, or Normal CD from the Distribution menu, we are able to calculate a range of different probabilities for the normal distribution. Where we have no lower or upper limit, then we need to use a high value, preferably at least 5 standard deviations away from the mean, but there is no reason not to go higher. Also, the video shows two methods of how you can find the probability for a region split between the upper and lower tail of the graph.

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Aʙᴏᴜᴛ Tʜɪs Vɪᴅᴇᴏ – This video looks at the Poisson Cumulative Distribution or Poisson CD and the List feature in Distribution mode on the Casio Classwiz fx-991EX. This video answers a number of questions using the List feature and shows you how to store values that can then be recalled in Calculate mode and further probabilities can be calculated.

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Aʙᴏᴜᴛ Tʜɪs Vɪᴅᴇᴏ – This video looks at the Poisson Probability Distribution or Poisson PD and the List feature in Distribution mode on the Casio Classwiz fx-991EX. This video answers a number of questions using the List feature and shows you how to store values that can then be recalled in Calculate mode and further probabilities can be calculated.

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Aʙᴏᴜᴛ Tʜɪs Vɪᴅᴇᴏ – Using the Binomial PD and the List feature, we can quickly find individual probabilities for X when it is distributed binomially. If you have a small interval you can add probabilities together to find intervals by using STO, but you must be careful which values you use and with larger intervals, you are better using Binomial CD.

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Aʙᴏᴜᴛ Tʜɪs Vɪᴅᴇᴏ – This video looks at a question involving the use of the binomial cumulative distribution and inverse binomial using the Casio fx-CG50 calculator. Binomial distribution is available in statistics mode and requires us to input an upper and lower limit as well as N and p values.

Question is from Edexcel AS and A level Mathematics – Statistics and Mechanics Year 1/AS © Pearson Education Limited 2017. Exercise 6C Q10 on page 94 is used here for purposes of review as covered under section 30 of the Copyright, Designs and Patents Act 1988
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Graph screenshots are from Binomial distribution App ©2016 Matt Bognar, Department of Statistics and Actuarial Science, University of Iowa. Available here ➜ https://homepage.divms.uiowa.edu/~mbo…

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