I used to have the older fx-83ES calculator but when that stopped working I bought the newer model. Now when I enter results into my calculator in stats mode to find the mean, standard deviation, etc; after pressing SHIFT 1; only 3 options come up where there used to be 5. I tried looking in the manual but it says that there are 5 options? How do I gain access to these options and if I can't then how do I find the standard deviation?
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