Intro to Statistics: Chapter 1 and 2 VOCAB | Quizlet

Statistics

The science of conducting studies to collect, organize, summarize, analyze, and draw conclusions from data.

Variable

A characteristic or attribute that can assume different values.

Population

All subjects (human or otherwise) that are being studied.

Sample

A group of subjects selected from a population.

Descriptive Statistics

The collection, organization, summarization, and presentation of data.

Qualitative Variable

A variable that has distinct categories according to some characteristic or attribute.

Quantitative Variable

A variable that can be counted or measured.

Discrete Variable

A quantitative variable whose possible values can be counted.

Continuous Variable

A quantitative variable that can assume an infinite number of values between any two specific values, obtained by measuring.

Frequency

The number of times a value or category occurs.

Relative Frequency

The proportion or percent of observations within a category.

Histogram

A graph that displays quantitative data using contiguous vertical bars of various heights to represent the frequencies of the classes.

Ogive

A graph that represents the cumulative frequencies for the classes in a frequency distribution.