Round 2 Lecture 2 Flashcards Preview

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Flashcards in Round 2 Lecture 2 Deck (9)
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1

Discrete Data

- Frequency Tables
- Charts (pie, bar, etc.)
- Cross Tabs

2

 Continuous Data

- Descriptive Statistics
- Histograms
- Boxplots

3

Summary statistics

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

mean

The sum of the values for all observations of a variable divided by the number of observations.

5

median

The observation below which 50%of the observations fall.

6

mode

The value that occurs most frequently.

7

variance

The sum of the squared deviations from the mean divided by the number of observations minus one

8

interquartile range

Difference between the first and third quartiles of the distribution

9

range

The maximum value for a variable minus the minimum value for that variable.