STAT 269 - Introductory Statistics

Practice Chapter 1 Quiz

1. Suppose that Messiah College wants to gather feedback about a possible new employee policy. To

make sure all employee groups are represented, employees are classied as faculty, administration, or

general sta. A simple random sample is taken within each of these groups. What is this sampling

scheme called?

2. In an experimental design, a researcher knew that income has an eect on the impression of advertising.

The researcher therefore divided the subjects available according to income, and then assigned the

people within each income group randomly to the advertising campaigns that were being compared.

This was controlled to insure that each campaign was rated by someone within each of the classes.

What is the name for this method of accounting for a factor we know to be important?

3. For each of the following, label the variable as qualitative or quantitative and discrete or continuous,

and give the measurement level. (you should have three labels for each variable)

(a) Weight of a brown snake.

(b) The \track" of a random student in a high school (vocational, business, college prep., etc.).

(c) Number of students who volunteer with Habitat for Humanity.

(d) Shoe size of an adult male.