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Yeah thats correct. Weird how you didnt get the answer through this. This is exactly what I did

Maybe you discounted the entire amount instead of half of the amount and the other half separately? And did you divide the rate by 2? You should've had the answer.

I had the blue book.

I think we had to calculate the pay using continuous compounding. I got the answer.

Actually it couldve been sample variance.

No it would be n-1 to correct its unbiased nature. "In statistics, Bessel's correction is the use of n − 1 instead of n in the formula for the sample variance and sample standard deviation,[1] where n is the number of observations in a sample. This method corrects the bias in the estimation of...

There was a question that asked for sample mean. It seamed straightforward but the trick was it was based on a SAMPLE not the POPULATION so it had to be the sum divided by N-1. Does anyone remember that?

I felt like there were atleast 10 questions that were low hanging fruits.. for instance there was a question where we needed to find SD from 2 data sets. Thankfully I remembered how to use the data function on the calculator