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.
Este exercício faz parte do curso
Foundations of Probability in R
Instruções do exercício
- 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.
Exercício interativo prático
Experimente este exercício completando este código de exemplo.
# 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