Topic overview

ELECTION SURVEYING

• Deciding what data to collect and how to collect it
• Recording data

PRESENTING THE DATA

• The pie chart / sector graph
• Bar and column graphs
• Bar graph

LINE GRAPHS

• Drawing a line graph

PICTOGRAPHS

• Pictograph question

TRENDS

• Extrapolating
• There’s more than one way to skin a cat

AVERAGES, MIDDLES, AND MOST FREQUENT NUMBERS

• Mean
• Median
• Mode

THE MEAN VERSUS THE MEDIAN

• Real estate housing values
• Handy Hint #19 - Don’t calculate averages of averages
• Averages of averages question

GROUPING DATA INTO CLASSES

• Grouping data question
• Choosing classes
• Handy Hint #20 - Be careful with trimming

HISTOGRAMS

• A continuous histogram

FREQUENCY POLYGONS

• Data observation question
• Handy Hint #21 - When can you compare frequency polygons

FINDING MEANS, MEDIANS AND MODES OF GROUPED DATA

• Mean of grouped data
• Median of grouped data
• Cumulative frequency graphs
• Mode of grouped data