Question

1. Which of the following variables is an example of a categorical variable?

a) The amount of money you spend on eating out each month.

b) The time it takes you to write a test.

c) The geographic region of the country in which you live.

d) The weight of a cereal box.

2. Which of the following is an example of a discrete random variable?

a) The monthly electric bill for a local business.

b) The number of people eating at a local café between noon and 2:00 p.m.

c) The amount of time it takes for a worker to complete a complex task.

d) The percentage of people living below the poverty level in Boston.

3. A measurement scale that rates product quality as either 1 = poor, 2 = average and 3 = good is known as:

a) Nominal

b) Ordinal

c) Interval

d) Ratio

4. Which of the following statements involve descriptive statistics as opposed to inferential statistics?

a) The Alcohol, Tobacco and Firearms Department reported that Seattle had 1,825 registered gun dealers in 2013.

b) Based on a survey of 380 magazine readers, the magazine reports that 30% of its readers prefer double column articles.

c) The FAA samples 425 traffic controllers in order to estimate the percent retiring due to job stress related illness.

d) Based on a sample of 350 professional baseball players, a baseball magazine reported that 23% of the parents of all professional baseball players did not play baseball.

5. Suppose a survey is taken of 300 high school seniors out of a total of 1,000 seniors. This group is probably a:

a) Sample

b) Population

c) System

d) Process

6. Which of the following is a quantitative variable?

a) the make of a washing machine

b) a person's gender

c) price of a car in thousands of dollars

d) whether a person is a college graduate or not

7. Pareto's principle is applied to a wide variety of behavior over many systems. It is sometimes referred to as the:

a) "20-80" Rule

b) "80-20" Rule

c) "10-90" Rule

d) "90-10" Rule

8. Which of the following is most likely a continuous numerical variable?

a) the number of gallons of paint purchased

b) the number of reams of paper ordered

c) the population of Egypt in 2005

d) the number of miles of interstate highways

9. A company has developed a new battery, but the average lifetime is unknown. In order to estimate this average, a sample of 110 batteries is tested and the average lifetime of this sample is found to be 200 hours. The 200 hours is the value of a:

a) parameter

b) statistic

c) sampling frame

d) population

Answer 1