Simulating variance of sum of two binomial variables
In the last multiple choice exercise, you examined the expected value of the sum of two binomials. Here you'll estimate the variance.
Bu egzersiz, kursun bir parçasıdır
Foundations of Probability in R
Egzersiz talimatları
- Use your simulation of the variables X and Y to estimate the variance of
X + Y. - Use your simulation to estimate the variance of
3 * X + Y.
Uygulamalı etkileşimli egzersiz
Bu egzersizi bu örnek kodu tamamlayarak deneyin.
# Simulation from last exercise of 100,000 draws from X and Y
X <- rbinom(100000, 20, .3)
Y <- rbinom(100000, 40, .1)
# Find the variance of X + Y
# Find the variance of 3 * X + Y