Exam 2: Data Collection

By taking a systematic sample,in which we select every 50^th shopper arriving at a specific store,we are approximating a random sample of shoppers.

Which statement is correct?

Which statement is false?

A population has groups that have a small amount of variation within them,but large variation among or between the groups themselves.The proper sampling technique is:

Analysis of month-by-month changes in stock market prices during the most recent recession would require the use of time series data.

A binary variable (also called a dichotomous variable or dummy variable)has:

Which is a discrete variable?

A cluster sample is a type of stratified sample that is based on geographical location.

Comparing a census of a large population to a sample drawn from it,we expect that the:

It is better to attempt a census of a large population instead of relying on a sample.

Before deciding whether to assess heavy fines against noisy airlines,which sampling method would the Federal Aviation Administration probably use to measure the peak noise from departing jets as measured by a ground-level observer at a point one mile from the end of the departure runway?

Which is a time series variable?

The number of FedEx shipping centers in each of 50 cities would be ordinal level data.

A problem with convenience sampling is that the target population is not well defined.

Responses on a seven-point Likert scale are usually treated as ratio data.