Probability and statistics unit 2

Connection

Reference graph of calculations

Mode

the peaks in a distribution 1- unimodal 2- bimodal 3 or more- multimodal

Percentile

A value is at the pth percentile in a distribution if p% of the values are less than or equal to that value

Skewed right

A distribution has this shape if it's tail extends farther right

Skewed left

A distribution has this shape if it's tail extends longer towards the left

Symmetric

A distribution has this shape if it's tail is the same on both sides

Stem plot (stem and leaf plot)

A graph for quantitative data retains the actual value

Histogram

A graph for quantitative data that uses bars to represent the frequency of values in an interval (not a bar chart)

Bar graph

A graph for quantitative data that uses bias to show the frequency of values in categories

Dot plot

A graph for quantitative data that uses dots to display the frequency of specific values; usually used with discrete data

Line graph

A graph for quantitative data that varies over time

Distribution

A set of values a variable takes in a group and how often it takes those values

Shape of a distribution

A summary of how values vary in a distribution

Uniform

All bars of the histogram are approximately the same/equal height

Conclude

Answer the question

Context

Describe the situation

Median

Value that divides the distribution in half

Quartile

Values that divide the distribution in fourths