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To find the variance, use the standard deviation.The standard deviation is the fifth number listed: sigma x.The expected value is the first number listed : x bar.Screen reads 1-Var Stats L1,L2 and press ENTER. When you see 1-Var Stats on your home screen, add L1,L2 so that your.Press STAT cursor right to CALC and down to 1: 1-Var Stats.Enter data into L1 and L2 as in the above.Expected Value/Standard Deviation/Variance.(Make sure you don't have anything entered on Y= screen.) Set Y valuesīetween 0 and 1 and choose Yscl by looking at your data. NOTE: Once you've done this the plot will be turned ON until you turn it OFF. Histogram (Bar Graph) picture - the last picture in the top row When on the Stat Plot screen, highlight the following options:

Press 2nd Y= and choose which plot you want. Into L1 and the corresponding probabilities should be entered into Your random variable(X) values should be entered Press MATH, cursor over to PRB, and down to 3:nCr.Press MATH, cursor over to PRB, and down to 2:nPr.