Round 2 Lecture 2 Flashcards
1
Q
Discrete Data
A
- Frequency Tables
- Charts (pie, bar, etc.)
- Cross Tabs
2
Q
Continuous Data
A
- Descriptive Statistics
- Histograms
- Boxplots
3
Q
Summary statistics
A
describe data sets or relationships between variables with one or a few numbers:
- What is the central value?
- How widely are values spread from the center? Are there -data that are very atypical?
- Are variables related?
4
Q
mean
A
The sum of the values for all observations of a variable divided by the number of observations.
5
Q
median
A
The observation below which 50%of the observations fall.
6
Q
mode
A
The value that occurs most frequently.
7
Q
variance
A
The sum of the squared deviations from the mean divided by the number of observations minus one
8
Q
interquartile range
A
Difference between the first and third quartiles of the distribution
9
Q
range
A
The maximum value for a variable minus the minimum value for that variable.
