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Q43Section ST (Statistics (Q11–Q65))43 of 65

Shifted exponential mean and minimum

Let {Xn}n≥1\{X_n\}_{n\ge1} be a sequence of independent and identically distributed random variables having probability density function f(x)={e−(x−θ)if x≥θ 0otherwise,f(x) = \begin{cases} e^{-(x-\theta)} & \text{if } x \ge \theta \ 0 & \text{otherwise,} \end{cases} where θ>0\theta > 0. Consider the following statements: (I) 1n∑i=1nXi\frac1n \sum_{i=1}^{n} X_i converges in probability to θ+12\frac{\theta+1}{2}, as n→∞n \to \infty. (II) lim⁡n→∞E(min⁡{X1,X2,…,Xn})=θ\lim_{n\to\infty} E(\min\{X_1, X_2, …, X_n\}) = \theta. Which of the above statements is/are true?

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