Questions from Essentials of Statistics

Q: Provide an example (other than one discussed in the text)

Provide an example (other than one discussed in the text) of a random variable that does not arise from a quantitative variable of a finite population in the context of randomness.

Q: Let X denote the number of siblings of a randomly selected student

Let X denote the number of siblings of a randomly selected student. Explain the difference between {X = 3} and P(X = 3).

Q: Fill in the blank. For a discrete random variable, the

Fill in the blank. For a discrete random variable, the sum of the probabilities of its possible values equals ___ .

Q: Suppose that you make a large number of independent observations of a

Suppose that you make a large number of independent observations of a random variable and then construct a table giving the possible values of the random variable and the proportion of times each valu...

Q: What rule of probability permits you to obtain any probability for a

What rule of probability permits you to obtain any probability for a discrete random variable by simply knowing its probability distribution?

Q: A variable x of a finite population has the following frequency distribution

A variable x of a finite population has the following frequency distribution: Suppose a member is selected at random from the population and let X denote the value of the variable x for the member obt...

Q: Which of the following numbers could not possibly be a probability?

Which of the following numbers could not possibly be a probability? Justify your answer. a. 5/6 b. 3.5 c. 0

Q: In the article, “Reasons for Non-uptake of Measles

In the article, “Reasons for Non-uptake of Measles, Mumps, and Rubella Catch Up Immunization in a Measles Epidemic and Side Effects of the Vaccine” (British Medical Journal, Vol. 310, pp. 1629–1632),...

Q: Apply the empirical rule to solve each exercise. The data

Apply the empirical rule to solve each exercise. The data set has size 80. Approximately how many observations lie within two standard deviations to either side of the mean?

Q: A variable y of a finite population has the following frequency distribution

A variable y of a finite population has the following frequency distribution: Suppose a member is selected at random from the population and let Y denote the value of the variable y for the member obt...