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| revprev | Admin | Jan 18'24 at 2:34 | +23 | ||
| revcurprev | Admin | Jan 18'24 at 2:34 | +23 | ||
| revcurprev | Admin | Jan 18'24 at 2:33 | +23 | ||
| revcur | Admin | (Created page with "'''Answer: B''' Let <math>S</math> denote the number of survivors. This is a binomial random variable with <math>n=4000</math> and success probability <math>\frac{21,178.3}{99,871.1}=0.21206</math> <math>E(S)=4,000(0.21206)=848.24</math> The variance is <math>\operatorname{Var}(S)=(0.21206)(1-0.21206)(4,000)=668.36</math> <math>\operatorname{Std} \operatorname{Dev}(S)=\sqrt{668.36}=25.853</math> The <math>90 \%</math> percentile of the standard normal is 1.282 Let...") | Jan 16'24 at 0:18 | +1,224 |