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Introduction Meaning and Scope

Quick practice

Question 1 of 5

If $\mathbf{x} \geq 1$ , is the critical region for testing $\mathrm{H}_{0}: \theta=2$ against the alternative $H_{1}: \theta=1$ , on the basis of the single observation from the population $f(x, \theta)=\theta \exp (-\theta x), 0 \leq x<\infty$ , then Size of type I error is

A

1/e

B

e

C

$\frac{1}{e^{2}}$

D

$e^{2}$