7. The number of defective pencils in a lot of 1000 is an example of a discrete random variable.
8. For a continuous distribution, P(X ≤ 100) is greater than P(X<100).
9. A continuous variable may not be Normally distributed.
10. The mean of a standard normal distribution is not equal to 1.
11. If the sample size is 1000, we can safely use the normal approximation to binomial even for small p.
12. For a binomial probability experiment, if p is 0.1 and n is only 150, we cannot use the normal approximation to the binomial distribution without continuity correction.