Presentations of Data Flashcards
function/use of graphs
help us visually make sense of quantitative data obtained from psychological investigations and provide an overall picture to summarise the results
4 types of data
- nominal
- ordinal
- interval
- ratio
nomial data
data that can be allocted to mutually exclusive categories
ordinal data
data put into categories tht can be logically order based on their meanies but the differences between these values is not standardised
interval data
data is ordered and the intervals on a scae are equal and based on a standard unit of measurement. the point indicting 0 is arbitrary and you can have negative values
ratio data
data has equal intervals and a genuine 0 point
what type of data do histograms present?
continuous data on interval or ratio scales of measurement
continuous data
data that can take any value
discrete data
data that cannot take any value
what is a histogram?
a series of touching vertical bars of equal width to represent each score or group of scores
when are bar charts used?
when data are in categories or to show average scores from different samples
which axis are frequencies always on?
y-axis
why are bars seperate on bar charts?
so continuous dta cannot be implied
when are frequency polygons useful?
when comparing 2 or more frequency distributions
what type of data can be presented on frequency polygons?
continuous data on interval or ratio scales
