Data Flashcards
What is Nominal Data
-In categories
What is Ordinal Data
Data ranked in order
- The gaps between each ranking is unclear
What is Interval Data
-Measured on a fixed scale
When are Bar Charts used
-used when data is in discrete categories
-use for nominal data and all measures of central tendency
-bars must be separate
How are Pie Charts used
-need frequencies or populations that can be expressed as a fraction
-have to be confident that the data represents the whole population
-hard to compare
How are Histograms and Line Graphs used
-show pattern in a whole data set where this is continuous data
-can show the distribution of scores
-line graph has connected points instead of bars
What do Scatter Graphs show
-display the findings of correlational studies
What is Raw Data
data collected from each participant
- no mathematical analysis on this data
What do Result Tables allow
allow an overview of the data
- identify any outliers or anomolies which dont match the data
What should you do to estimate the mean
Assume the midpoint
What does ~ ~mean
Approximately equal to
What is Measures of Dispersion
Gives an indication of how spread out the results within a data set are
uses range, variance and standard deviation
What is the Range
(Largest - Smallest +1)
Scales measures gaps between points
tells us how similar groups are
What is Variance
How close on average people in the data set are to the mean
smaller the number , the more similar the participants are
What is Standard Deviation
Tells us the average distance from each score from the mean
