______1. A random sample of 60 items is taken producing a sample mean of 25 and a sample standard deviation of 12.25. What is the value for 95% confidence interval to estimate the population mean? ______2. Thirty trials are conducted in the Bernoulli process in which the probability of success in a given trial is 0.6. What is the value of x ? Z 0 score for P(Z Z 0 ) = 0.0708? ______3. What is ______4. The random variable x has a normal distribution with = 40 and 2 = 36. What is the value of x if P(X X 0 ) = 0.40? 5. Explain the differences between discrete random variable and continuous random variable. 6. What are the characteristics of discrete probability distribution? 7. When should the z-test be used and when should t-test be used? 8. Explain the following concept: a) Central Limit Theorem b) Type I error and Type II error c) What is the sampling distribution of the mean? d) What is ? e) How do we control