Unformatted text preview: Next you see X 2 =. Just put in the value for the second X of the distribution and then down arrow to FRQ and either leave it as 1 or change it to the appropriate value. Just keep repeating this sequence until you have entered the last X and its frequency. Finally, press the STATVAR button and wallaaaaa, there’s all the answers! You will see n and it gives you the size of your sample (which is the sum of the frequencies). Push the right arrow and you will see the mean, press the right arrow again and you will see S x, which is the sample standard deviation of your X values. The next one is a fish looking symbol called alpha which is the population standard deviation (we don’t need that). Keep pressing the right arrow and you will find the sum of X and the sum of X 2. Isn’t it just beautiful? I bet you wish I would have told you sooner, but then you would not understand what standard deviation actually is. Enjoy....
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 Spring '11
 Lambda
 Statistics, Standard Deviation, right arrow, distribution. Press

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