>>285792let me just work through them. This is a polynomial distribution, a bit different from the binomial distribution that the last problem had
n=214+74+28=316
for "Win"
variance = n*p*(1-p) = 316*(214/316)*(102/316) = 69.0759
stdev = sqrt variance = 8.311
so in %, the stdev = 8.311/316 = .026
for "Loss"
variance = n*p*(1-p) = 316*(74/316)*(242/316) = 56.6708
stdev = sqrt variance = 7.528
so in %, the stdev = 7.528/316 = .0238
for "Overtime"
variance = n*p*(1-p) = 316*(28/316)*(288/316) = 25.519
stdev = sqrt variance = 5.05
so in %, the stdev = 5.05/316 = .01599
The table is correct, with rounding.
I suspect you were using the wrong formula for standard deviation. For a polynomial the stdev = n * p * (p-1). For the binomial, above, it was the same
