calculate mean, variance and stdev
I’m on the quantitative part, i got the TI BAII calculator. But i find it still hard/time consuming to get mean and stdev for a data series. Getting mean is fine, except lot of pressing. But to get the stdev/variance, you will need to keep a lot of intermediate result, and this takes a lot of time, e.g. one of the practice problems had 13 data points. So what is the best/fastest way to calculate those parameters?
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