Test Bank all Chapters, Answer at the

Business Statistics in Practice 7e Bruce Bowerman Richard OConnell Emily Murphree

(Test Bank all Chapters, Answer at the end of each Chapter)

(For Complete File Download link at the end of this File)

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1-1 © 2014 by McGraw-Hill Education. This is proprietary material solely for authorized instructor use. Not authorized for sale or distribution in any manner. This document may not be copied, scanned, duplicated, forwarded, distributed, or posted on a website, in whole or part.Chapter 01 An Introduction to Business Statistics

True / False Questions

• A population is a set of existing units.

True False

• If we examine some of the population measurements, we are conducting a census of the

population.

True False

• A random sample is selected so that every element in the population has the same chance of

being included in the sample.

True False

• An example of a quantitative variable is the manufacturer of a car.

True False

• An example of a qualitative variable is the mileage of a car.

True False

• Statistical inference is the science of using a sample of measurements to make

generalizations about the important aspects of a population of measurements.

True False

• Time series data are data collected at the same time period.

True False

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1-2 © 2014 by McGraw-Hill Education. This is proprietary material solely for authorized instructor use. Not authorized for sale or distribution in any manner. This document may not be copied, scanned, duplicated, forwarded, distributed, or posted on a website, in whole or part.

• Cross-sectional data are data collected at the same point in time.

True False

• Daily temperature in a local community collected over a 30-day time period is an example of

cross-sectional data.

True False

• The number of sick days taken by employees in 2008 for the top 10 technology companies is

an example of time series data.

True False

• The number of sick days per month taken by employees for the last 10 years at Apex Co. is an

example of time series data.

True False

• A quantitative variable can also be referred to as a categorical variable.

True False

• In a data set of information on college business students, an example of an element is their

cumulative GPA.

True False

• In an observational study, the variable of interest is called a response variable.

True False

• In an experimental study, the aim is to manipulate or set the value of the response variable.

True False

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1-3 © 2014 by McGraw-Hill Education. This is proprietary material solely for authorized instructor use. Not authorized for sale or distribution in any manner. This document may not be copied, scanned, duplicated, forwarded, distributed, or posted on a website, in whole or part.

• The science of describing the important aspects of a set of measures is called statistical

inference.

True False

• It is possible to use a random sample from one population to make statistical inferences

about another related population.

True False

• Processes produce outputs over time.

True False

• Selecting many different samples and running many different tests can eventually produce a

result that makes a desired conclusion seem to be true when the conclusion is true.

True False

• Using a nonrandom sample procedure in order to support a desired conclusion is an example

of an unethical statistical procedure.

True False

Multiple Choice Questions

21. A ratio variable has the following characteristic:

• Meaningful order

• Inherently defined zero value

• Categorical in nature

• Predictable

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