Statistics Chapter 2 - Organizing Data

Data that is not organized

Raw data

Frequency distribution

Table, lists category and number of occurences

Frequency

Amount of times it appears, data is qualitative

Relative frequency

Proportion of observations within a category

Relative frequency formula

Frequency/Sum of all frequencies

Relative frequency distribution

Sum of frequency should be SRS

Distrubtion

Fancy way of asking for a table

Bar graph

Labeling each category or data vertically or horizontally and heights of the rectangle must be equal length

Elemtns of a graph

X axis, Y axis, tutle

bars do not touch each other

graphs start at 0

Pareto chart

Descending order of height/frequency

Side by side

Make comparisons between 2 things

Legend

Gives an example that relates to color or shape

Two different sample sizes,

Put on the same scale

Pie chart

Circle divided into sectors

Discrete

Can be in classes or not

Histogram

Bar graph for quantitative data, rectanfles tough each other

No bar

No dataC

Continuous

nEed classes

Lower class limit

Smallest value within the class

Upper class limit

Largest value within a class

Class width

Lower-Lower

1 of your classes

Open ended

Creating classes

Lowest and highest value

You want between

5-20 classes

X-axis are labeled with

lower class limits

Dot plot uses

dots

Uniform

Same

Bell

Shaped like abell

Skewed right

Tail is on right

Skewed Left

Tail is on left