Statistics

relative frequency

Relative Frequency

This is just the number of times something happened (frequency) divided by the number of times you tried the experiment.Relative Frequency = Frequency / Number ...
tree diagram

Tree Diagrams

A tree diagram is just a way of showing all the possible outcomes of an event or series of events. Above is an example of one showing the possible outcomes when...
and or rules

AND / OR Rules

Combined ProbabilityWhen you have two or more events happening in a question: Break the question down into a sequence of separate events Find the probabil...
sample space diagram

Listing Outcomes and Expected Frequency

Sample Space DiagramsSample space diagrams can be used to list all outcomes.Example: A spinner has three sides numbered 1, 2 and 3. It is spun twice and the res...
basic probability

Basic Probability

All Probabilities Are Between 0 And 1 A probability of 1 means something is certain to happen A probability of 0 means something definitely won't happ...
correlation and scatter graphs

Scatter Graphs

Scatter graphs tell you how closely two things are related....which is called "correlation".If you can draw a line of best fit on your graph quite close to most...
frequency polygon graph

Other Charts

Frequency PolygonsThese are just used to represent grouped data. You take the mid-interval value of each class and draw a straight line between each of the poin...
histogram chart

Histograms and Frequency Density

Histograms are like bar charts but the bars can have different widths...and the area of the bar shows the frequency...sounds confusing right? Don't worry we'll ...
cumulative frequency graph showing median, quartile one and quartile three.

Cumulative Frequency

Cumulative frequency means you just keep a running total as you go along. Example: The table below shows the lengths of 32 bananas. Draw a cumulative frequency ...
frequency tables main image

Frequency Tables

A frequency table tells you how many items from a data set are in each category.Within a frequency table: The mode is just the category with the most entrie...