A __________ is a subset of a population.

A __________ is a numerical characteristic of a sample characteristic.

__________ __________ is the branch of statistics that involves the organization, summarization, and display of the data.

___________ ___________ is the branch of statistics that involves using a sample to draw conclusion about a population.

__________ data consist of numerical measurements or counts.

__________ data consist of attributes, labels, or nonnumerical entries.

Which of the following are the levels of measurement? (select all that apply)

What is the difference between a census and a sampling?

The use of a mathematical or physical model to reproduce the conditions of a situation or process is a(n) ...

An investigation of one or more characteristics of a population is a(n) ...

A sample in which every member of a population has an equal chance of being selected is called a ...

What type of sample often leads to biased studies?

A __________ sample is used when the population falls into naturally occurring subgroups, each having similar characteristics. To select this type of sample, the population is divided into groups called clusters. Then, all the members of one or more (but not all) of the clusters are selected.

A __________ sample is used when it is important to have members from each segment of the population. Depending on the study, members are divided up into 2 or more different subsets, called strata, that share a similar characteristic, such as age, gender, ethnicity, or even political preference. A sample is then randomly selected from each strata.

A __________ sample is a sample in which each member of the population is assigned a number. The members of the population are ordered in some way, a starting number is randomly selected, and then sample members are selected at regular intervals from the starting number. (For instance, every 3^rd , 5^th , or 100^th member is selected.)

A __________ sample is one that is not representative of the population from which it is drawn.