A population is a set of existing units. True
An example of a quantitative variable is the manufacturer of a car. False
Time series data are data collected at the same time period. False
The number of sick days taken by employees in 2008 for the top 10 technology companies is an
example of time series data. False
In a data set of information on college business students, an example of an element is their
cumulative GPA. False
The science of describing the important aspects of a set of measures is called statistical inference.
False
Selecting many different samples and running many different tests can eventually produce a result
that makes a desired conclusion be true. False
Secondary data are data taken from an existing source. True
In order to select a stratified random sample, we divide the population into overlapping groups of
similar elements. True
A common practice in selecting a sample from a large geographic area is multistage cluster
sampling. True
Sampling error can occur because of incomplete information. True
