Data Flashcards
1
Q
What is Nominal Data
A
-In categories
2
Q
What is Ordinal Data
A
- Data ranked in order
- The gaps between each ranking is unclear
3
Q
What is Interval Data
A
-Measured on a fixed scale
4
Q
When are Bar Charts used
A
- used when data is in discrete categories
- use for nominal data and all measures of central tendency
- bars must be separate
5
Q
How are Pie Charts used
A
- 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
6
Q
How are Histograms and Line Graphs used
A
- 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
7
Q
What do Scatter Graphs show
A
-display the findings of correlational studies
8
Q
What is Raw Data
A
- data collected from each participant
- no mathematical analysis on this data
9
Q
What do Result Tables allow
A
- allow an overview of the data
- identify any outliers or anomolies which dont match the data
10
Q
What should you do to estimate the mean
A
Assume the midpoint
11
Q
What does ~ ~mean
A
Approximately equal to
12
Q
What is Measures of Dispersion
A
- Gives an indication of how spread out the results within a data set are
- uses range, variance and standard deviation
13
Q
What is the Range
A
- (Largest - Smallest +1)
- Scales measures gaps between points
- tells us how similar groups are
14
Q
What is Variance
A
- How close on average people in the data set are to the mean
- smaller the number , the more similar the participants are
15
Q
What is Standard Deviation
A
Tells us the average distance from each score from the mean
