Exam 1: An Introduction to Business Statistics

Statistical inference is the science of using a sample of measurements to make generalizations about the important aspects of a population of measurements.

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

A(n)_____________ variable is a qualitative variable such that there is no meaningful ordering or ranking of the categories.

Using the following data table of the average hours per week spent on Internet activities by 15- to 18-year-olds for the years 1999-2008,construct the runs plot and interpret. Year Avg Hrs 1999 13.5 2000 15.0 2001 16.5 2002 17.7 2003 18.2 2004 19.3 2005 19.5 2006 19.9 2007 20.1 2008 20.4

Temperature (in degrees Fahrenheit)is an example of a(n)__________ variable.

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.

If we collect data on the number of wins each team in the NFL had during the 2011-12 season,we have _____________ data.

Measurements from a population are called

When the data being studied are gathered from a private source,this is referred to as a(n)_______________.

__________ is a necessary component of a runs plot.

Data collected for a particular study are referred to as a data ____________.

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

The change in the daily price of a stock is what type of variable?

Which of the following is NOT an example of unethical statistical practices?

Statistical ____________ refers to using a sample of measurements and making generalizations about the important aspects of a population.

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

Examining all population measurements is called a _____________.

Any characteristic of a population unit is a(n):

Using a nonrandom sample procedure in order to support a desired conclusion is an example of an unethical statistical procedure.

College entrance exam scores,such as SAT scores,are an example of a(n)_____________ variable.