11-1 Designing a study

the tendency of a sample or statistic to misrepresent the population

a controlled study in which the researcher attempts to understand cause-and-effect relationships by assigning subjects to groups and deciding which treatments each group receives

a study in which the researcher attempts to understand cause-and-effect relationships without assigning subjects to groups or deciding which treatments each group receives

a questionnaire given to a population or a sample of population

You want to find opinions on the best computer game to buy.

You want to see if students who have a 4.0 grade point average study more than those who do not.

You want to compare the health of students who walk to school to the health of students who ride the bus

You want to find out if people who eat a candy bar immediately before a math test get higher scores than people who do not.

What is your current age?

Do you think teachers should be required to attend all home and away football games?