Statistics Flashcards
1
Q
Primary data
A
Data we collect ourselves
2
Q
Secondary data
A
Data collected by someone else
3
Q
Simple random sample
A
There is an equal chance of chosen
Non bias
A randomly selected sample from a larger sample or population
4
Q
Two types of data
A
Categorical
Numerical
5
Q
Two types of categorical
A
Nominal
Ordinal
6
Q
Example of nominal
A
No order (colour sports )
7
Q
Example of Ordinal
A
Order exists ( alphabet abcdef)
8
Q
2 types of numerical
A
Discrete
Continuous
9
Q
Example of discrete
A
Exact number (number of chairs in room)
10
Q
Example of Continues
A
Can be found more exact ( foot size ) 22cm 22inch 22 mm
11
Q
Mean
A
The sum of all data value
______________________________
Number of data value
12
Q
Mode
A
The most common item that occurs
13
Q
Median
A
Is the middle value
14
Q
Range
A
Maximum - minimum
15
Q
2 shapes of distribution
A
Symmetric
Skewed
