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