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.
Questo esercizio fa parte del corso
Foundations of Probability in R
Istruzioni dell'esercizio
- 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.
Esercizio pratico interattivo
Prova a risolvere questo esercizio completando il codice di esempio.
# 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