Univariate Data

Stem and leaf plot

A type of graphic display of data with a stem first digit

Statistic

An attribute of a sample

Univariate data

Data that describes a single characteristic of the subject or individual

Multivariate data:

Data that describes multiple characteristics of the subject or individual

Quantitative data

Data that represents a numerical measure or value.

Interquartile range:

Q3-Q1

Outlier

A data point that lies outside of the general pattern of data

Symmetric distribution

A distribution that has identical halves

Skewed distribution

A distribution where the majority of the values fall either to the left or the right when graphed

Uniform distribution:

A distribution where the values along the vertical axis all fall on a horizontal line.

Box plot

A graph that displays the distribution of data by focusing on five key measures: the minimum value, the first quartile, the median, the third quartile, and the maximum value

Relative frequency histogram

A histogram that displays the percent of data that fall into each bar

Cumulative frequency plot

A histogram where any given bar represents the proportion of data values that fall into that value or anything less than that value

Dotplot

A number line graph representing the possible values and distribution of the data

Histogram

a bar chart where the height of the bar represents the count within the interval on the x-axis

Mean

average

Discrete data

data when every possible value can be listed

Continuous data

data with an infinite number of data results possible

Standard deviation

deviation of data values from mean

Variance

deviation of data values from mean

Median

middle value of data set

Categorical data

qualitative data

Range

the difference between the largest data value and the smallest data value in a distribution