Question about Casio fx-300ES Calculator
I am calculating the Standard Deviation on this calculator fine as below:
Set the [Mode] to [3:STAT]. You are offered the choices
If you want to do 1-Var statistics, you press 1:1-Var. A column template opens where you put the X values. If a value is repeated you enter it several times. (there is no frequency column.)
When you enter all data you press [SHIFT][STAT]
You have several choices among them
4: SUM to get SigmaX^2 and Sigma X
5: VAR to get n, the mean X bar, the sample and population standard deviations
6:MINIMAX to get MinX and MaxX
7: Distr the Distributions.
However I want to find the variance. How can I easily do this?
Having calculated the Standard Deviation. I cannot see a way of taking the square of the Standard Deviation other than writing it down and typing it back in.
I have tried the square function and saving the SD to memory with no success. I wonder if I am just missing the obvious here.
This question could be phrased as having got an answer through the Stat mode described above how can I then perform another action on that answer?
Grateful for any advice.
I am happy that you found my solution helpful and even flattered that you copied it in this thread. By doing this, you gave me the opportunity to discover an error in my post. In fact, the calculator does provide a column for the frequency. If you enter nothing in the frequency column, all data items will have their frequency set to 1, by default.
Back to the current subject: How to get the variance (the square of the standard deviation).
When you finish entering your data:
While the symbol xSigma_n or xSigma_n-1 is still displayed with the blinking cursor to its right, press the [x^2] key above the [HYP] key. The screen displays say xSigma_n ^2. Press [=] to calculate the variance.
As my motto says, I am always happy to help, but happier still when people show true appreciation.
Hope it helps.
Posted on Dec 12, 2009
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Posted on Jan 02, 2017
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