Which of the following describes the distribution of Y=X2Y = X^2Y=X2 where X∼N(0,1)X \sim N(0, 1)X∼N(0,1)?
Exponential distribution with λ=1/2\lambda = 1/2λ=1/2
Gamma distribution with α=1/2,β=1/2\alpha=1/2, \beta=1/2α=1/2,β=1/2
Chi-squared distribution with df=1df=1df=1
All of the above