Introduction Flashcards
1
Q
Simpson’s Paradox
A
Aggregated data may have different outcome than when split up
2
Q
Objective of statistics
A
Make an inference about a population based on information in a sample
3
Q
Population
A
set of units (people, objects, or events)
4
Q
Sample
A
subset of the units of a population
5
Q
Quantitative data
A
numerical
6
Q
Qualitative data
A
descriptive
7
Q
ordinal data
A
values are ordered
8
Q
nominal data
A
no particular order
9
Q
Presenting nominal and ordinal data
A
frequency table
10
Q
Proportion
A
of interest / total #
11
Q
ratio
A
number of interest / number not of interest
12
Q
Pie chart useful for
A
relative proportions
13
Q
sample mean
A
arithmetic mean
14
Q
geometric mean
A
nth root of product
3root of (1 x 2 x 3 )
used when data on log scale
15
Q
IQR
A
Q3 - Q1
