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1

What are the two types of statistics?

Descriptive and Inferential

2

Descriptive Statistics

describe and summarize data

3

Inferential statistics

the use of samples to make inferences about a population

4

inferences

draw conclusions

5

data set

data collected in study

6

qualitative/categorical values

descrive an attribute (color)

7

quantitative variable

are numerical values (number of students)

8

what are two types of quantitative variables?

discrete variables and continuous variables

9

discrete variables

can be counted

10

continuos variables

value in any range, can be measured but not counted (speed)

11

nominal

data can only be sorted by class

12

mutually exclusive and exhaustive

mutually exclusive: cannot occur at the same time
exhaustive: includes all possible outcomes

13

ordinal

sorted by class, but classes are ordered

14

interval

measurement between data (but ratios don't apply)

15

cross-sectional data

data collected at the same time

16

time series data

data collected over different periods of time

17

experimental

one or more variables can be controlled

18

observational studies

cannot control the variables