College Math Ch 5

Describes qualities or non-numerical categories

represents counts or measurements

Describes qualities or non-numerical catagories: Not numbers

In a statistical study is the complete set of people or things being studied.

Is the subset of a population from which the raw data are actually obtained.

Are the specific characteristics of the population that a statistical study is designed to estimate

Are numbers or observations that summarize the raw data.

Is a sample in which the relevant characteristics of the sample members match those of the population.

Sampling method that randomly chooses subjects w/ no order or specific criteria

Sampling Method that uses a method or specific way to choose the subjects

Sampling method that uses convenince in choosing its subjects.

Sampling Method that chooses a subset with in a subset

1 of 2 different study methods. Based on observation. No contact. No affecting population.

1 of 2 study methods: Apply treatment to some or all the members of a study.

the group that receives treatment in an experiment study

The group that does not receive treament in an experiment study. May get a placebo.

Fake treatment. example: sugar pill

False effects. All in your mind. Because you received a treatment, you believe you feel the effects.

An experiment when the participants do not know whether they are members of the treatment or the control group, but the experimenters do.

An experiment when neither the participants nor the experimenters know who belongs to the treatment or control groups.

An observational studay that resembles an experiment because the sample naturally divides into 2 or more groups.

The science of statistics which helps us collect, organzie and interpet data

(are the data that describe or summarize something)