Exam 1: An Introduction to Business Statistics

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.

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

A ratio variable has the following characteristic:

Which of the following is a quantitative variable?

Any characteristic of an element is called a ____________.

An identification of police officers by rank would represent a(n)____________ level of measurement.

One method of determining whether a sample being studied can be used to make statistical inferences about the population is to:

Looking at the runs plot of gasoline prices over the past 30 months,describe what it tells us about the price of gas during these 30 months.

A ___________ is a display of individual measurements versus time.

A person's telephone area code is an example of a(n)_____________ variable.

A study is being conducted on the effect of gas price on the number of miles driven in a given month.Residents in two cities,one on the East Coast and one on the West Coast are randomly selected and asked to complete a questionnaire on the type of car they drive,the number of miles they live from work,the number of children under 18 in their household,their monthly income,and the number of miles they have driven over the past 30 days.List the factor(s).

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

A ____________ variable can have values that are numbers on the real number line.

The number of sick days taken by employees in 2008 for the top 10 technology companies is an example of time series data.

A set of all elements we wish to study is called a ____________.

The weight of a chemical compound used in an experiment that is obtained using a well-adjusted scale represents a(n)_____________ level of measurement.

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

It is possible to use a random sample from one population to make statistical inferences about another related population.

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

The number of miles a truck is driven before it is overhauled is an example of a(n)_____________ variable.