3. What is the name of the distribution that measures the number of occurrences of an event during specified intervals?

4. What would be the characteristics of a binomial distribution?

5. A population consists of ten items, six of which are defective. In a sample of three items, what is the probability that exactly two are defective?

6. A Federal study reported that 7.5 percent of the U.S. workforce has a drug problem. A drug enforcement official for the State of Indiana wished to investigate this statement. In his sample of 20 employed workers:
a. How many would you expect to have a drug problem? What is the standard deviation?
b. What is the likelihood that none of the workers sampled has a drug problem?
c. What is the likelihood at least one has a drug problem?

7. What is "Bias"?

8. What is the Central Limit Theorem? What does it imply?

Question 1:
When is the mean the best measure of central tendency? When is the median the best measure of central tendency? Explain.
Questions 2:
A researcher has determined that the distribution of annual salaries of NBA players is bell-shaped and symmetrical about the mean salary, do you think that introducing Michael

1. Some normal probability distributions may have the same mean, but their standard deviation may be different
True or False
2. As the sample size increases, the standard error of the sample mean increases.
True or False
3. Which of the following statement(s) about the normal probability distribution is/are true?

What are the characteristics of a standard normal distribution? Can two distributions with the same mean and different standard distributions be considered normal? How might you determine if a distribution is normal from its graphical representation?

I need some help with the following statistical concepts:
Now we are going to talk about continuous probability distributions. In a continuous probability distribution, the variable can have a value within a range.
The most common continuous distribution is the standard normal distribution, select a continuous random varia

1. What are the characteristics of a normal curve? Give 3 examples of processes, which could produce normally, distributed outcome.
2. What are the differences between z-statisticsand t-statistics?
3. What do confidence intervals represent? Please use an example to complement your response.

1. For a standardized normal distribution calculate the following probabilities
a. P(0.00 < z < or equal to 2.33)
b. P( -1.00 < z < or equal to 1.00)
c. P( 1.78 < z < 2.34).
2. A random variable is normally distributed with mean of 25 and standard deviation of 5. If an observation is randomly selected
a. what val

If the mean and the standard deviation of a continuous random variable that is normally distributed are 20 and 5, respectively, find an interval that contains 68% of the distribution.
A. (18,24)
B. (15,25)
C. (12,25)
D. (10,30)
2. If the mean and the standard deviation of a continuous random variable that is normally d

I need to know how to use the formula to answer these questions.
The time needed to drive from town A to town B is normally distributed with a mean of 180 minutes and standard deviation of 20 minutes. What is the probability that a person will drive from town A to town B in i) three hours or more, ii) in less than 180 minut