It’s more usual in statistics to find thesample variance. The steps are the same, but the notation is slightly different. Here’s the formula: where s2is the sample variance ∑ is the sum (i.e., add them all up!) X is a data point ...
Relevant Equations stats OK, Let me attempt part (i), first, Here we have; ##s^2_p ##=##\dfrac{ (n_1-1)s_1^2+(n_2-1)s_2^2}{n_1+n_2-2}## ##s^2_p ##=##\dfrac{ (7-1)0.63953+(7-1)0.6148}{7+7-2}## ##s^2_p ##=##\dfrac{3.83718+3.6888}{12}## #...
When we know the probability p of every value x we can calculate the Expected Value (Mean) of X:μ = ΣxpNote: Σ is Sigma Notation, and means to sum up.To calculate the Expected Value:multiply each value by its probability sum them up...
The calculation and notation of the variance and standard deviation depends on whether we are considering the entire population or a sample set. Following the general convention of using Greek characters to express population parameters and Arabic characters to express sample statistics, the notation for...
Let’s look at some headline Stats after doing this first round of culling: No Trades flagged asBlock 38 Trades flagged asCleared. I do recall a press release aboutOCCclearing variance swaps, but I’ve confirmed that is not happening, so not sure what these are. ...