Representing Data

• what info is included in tables?

  • title that refers to the data.
  • operationalised labelled horizontal axis (x).
  • operationalised labelled vertial axis (y).
  • correct plotting.
• what is the difference between continuous and discrete data?

  • discrete- limited set of values (whole numbers) e.g. shoe size.
  • continuous- this can have any values e.g. foot length.
• when do you use bar graphs?

  to display discrete data. bars should not touch.
• when do you use line graphs?

  to plot continuous data, e.g. time.
• when do you use scattergrams?

  to display relationship between 2 factors of the correlation. a trend line is used to determine positive, negative, or no correlation.
• what does a pie chart show us?

  divided into sectors to show numerical proportion.
• what do histograms show us?

  to display continuous data.

  • continuous scores = x axis.
  • frequency = y axis.
• what is the difference between a bar chart and a histogram?

  bar charts- discrete data, bars don't touch.

  histogram- continuous data, bars touch.