Question

1. The domain of an exponentially distributed random variable is ________________________.

1. [0, 1].
2. [0, ∞).
3. all Real Numbers.
4. (-1E99, 1E99).

2. It is proposed that 85% of the world’s population is now doing some type of online shopping. If we

wish to estimate the proportion of people who shop online, then how many people should be sampled if we desire a 98% confidence interval with a bound of 3%?                                ___________

a)   85

2. 99
3. 770
4. 1068          

3.  Holding everything else constant, as α increases β increases. True or False?

Answer 1