When constructing charts, the following is plotted at the class midpoints:

Select one:

a. percentage polygons

b. All of these

c. frequency histograms

d. cumulative percentage polygon (ogives)

When polygons or histograms are constructed, which axis must show the true zero or "origin"?

Select one:

a. Both the horizontal and vertical axes

b. The vertical axis

c. The horizontal axis

d. Neither the horizontal nor the vertical axis

Which of the following is a discrete quantitative (numerical) variable?

Select one:

a. The volume of water released from a dam

b. The Dow Jones Industrial average

c. The number of employees of an insurance company

d. The distance you drove yesterday

The data below represent the amount of grams of carbohydrates in a serving of breakfast cereal in a

sample of 11 different servings: 11 15 23 29 19 22 21 20 15 25 17, the median carbohydrate amount in the cereal is ________ grams.

Select one:

a. 22

b. 15

c. 20

d. 19

The data below represent the amount of grams of carbohydrates in a serving of breakfast cereal in a

sample of 11 different servings: 11 15 23 29 19 22 21 20 15 25 17, the median carbohydrate amount in the cereal is ________ grams.

Select one:

a. 22

b. 15

c. 20

d. 19

The employees of a company were surveyed on questions regarding their educational background (college degree or no college degree) and marital status (single or married). Of the 600 employees, 400 had college degrees, 100 were single, and 60 were single college graduates. The probability that an employee of the company is single or has a college degree is:

Select one:

a. 0.10

b. 0.667

c. 0.25

d. 0.733

The classification of student class designation (freshman, sophomore, junior, senior) is an example of

Select one:

a. a categorical variable

b. a continuous variable

c. a table of random numbers

d. a discrete variable

When studying the simultaneous responses to two categorical questions, you should set up a

Select one:

a. contingency table

b. cumulative percentage distribution table

c. histogram

d. frequency distribution table

Which of the following is NOT sensitive to extreme values?

Select one:

a. The interquartile range

b. The coefficient of variation

c. The standard deviation

d. The range

Which of the following statistics is not a measure of central tendency?

Select one:

a. Median

b. Q3

c. Mode

d. Arithmetic mean

A type of vertical bar chart in which the categories are plotted in the descending rank order of the magnitude of their frequencies is called a

Select one:

a. Contingency table

b. Pareto chart

c. Stem-and-leaf display

d. Pie chart

If A and B cannot occur at the same time they are called mutually exclusive.

Select one:

a. True

b. False

You have collected data on the responses to two questions asked in a survey of 40 college students majoring in businessWhat is your gender (Male = M; Female = F) and What is your major (Accountancy = A; Computer Information Systems = C; Marketing = M). Which of the following is the best for presenting the data?

Select one:

a. A time-series plot

b. A stem-and-leaf display

c. A contingency table

d. A Pareto chart

The universe or "totality of items or things" under consideration is called

Select one:

a. a primary data source

b. a secondary data source

c. a sample

d. a population

A summary measure that is computed to describe a characteristic of an entire population is called

Select one:

a. a parameter

b. a summary table

c. an ordered array

d. a statistic

You were told that the 1st, 2nd and 3rd quartiles of female students weight at a major university are 95 lbs, 125 lbs, and 138 lbs. What percentage of the students weigh more than 138 lbs?

Select one:

a. 100%

b. 25%

c. 75%

d. 50%

In general, which of the following descriptive summary measures cannot be easily approximated from a boxplot?

Select one:

a. The interquartile range

b. The range

c. The median

d. The variance

You have downloaded data on crime rate and median income level for 150 communities. You wonder whether there is any association between crime rate and median income level. Which of the following is the best for presenting the data?

Select one:

a. A scatter chart

b. A stem-and-leaf display

c. A time-series plot

d. A histogram

The number of defective apples in a single box is an example of a continuous variable.

Select one:

a. True

b. False

A business venture can result in the following outcomes (with their corresponding chance of occurring in parentheses): Highly Successful (10%), Successful (25%), Break Even (25%), Disappointing (20%), and Highly Disappointing (?). If these are the only outcomes possible for the business venture, what is the chance that the business venture will be considered Highly Disappointing?

Select one:

a. 20%

b. 15%

c. 10%

d. 25%

If two events are collectively exhaustive, what is the probability that both occur at the same time?

Select one:

a. 1.00

b. 0

c. Cannot be determined from the information given

d. 0.50

The smaller the spread of scores around the arithmetic mean,

Select one:

a. the smaller the coefficient of variation

b. the smaller the interquartile range

c. None of these

d. All of these

e. the smaller the standard deviation

According to the empirical rule, if the data form a "bell-shaped" normal distribution, _______ percent of the observations will be contained within 1 standard deviation around the arithmetic mean.

Select one:

a. 93.75

b. 68.26

c. 75.00

d. 88.89

Which of the following is not true about business analytics?

Select one:

a. It enables you to use management science methods to develop optimization models that impact an organizations strategy, planning, and operations.

b. It enables you to use information systems methods to collect and process data sets of all sizes.

c. It enables you to use statistical methods to analyze and explore data to uncover unforeseen relationships.

d. It enables you to use complex mathematics to replace the need for organizational decision making and problem solving.

If the outcome of event A is not affected by event B, then events A and B are said to be

Select one:

a. none of these

b. independent

c. mutually exclusive

d. collectively exhaustive