Important Prelim Terms Flashcards
1
Q
How can a graph be misleading?
A
- no scale
- uneven scale
- not showing the correct position of zero
- only showing part of the scale
2
Q
Categorical data
A
represented by quantities, words, or symbols
3
Q
Numerical data
A
represented by quantities or numbers
4
Q
Nominal data
A
cant be ordered
5
Q
Ordinal data
A
can be ordered
6
Q
Discrete data
A
counted separate values, gaps
7
Q
Continuous data
A
smooth scale, no gaps
8
Q
Sampling
A
- surveys a representative group of items from a population
- provides an estimate for approximate info about population
- simple and not expensive
9
Q
Census
A
- surveys all items in pop
- provides exact info
- complex and expensice
10
Q
systematic sample
A
a system is used to select items
11
Q
stratified sample
A
population divided into characteristics, random sample from each
12
Q
self selected sample
A
people choose to participate
13
Q
class centre
A
the centre of a class interval (average of that category)
14
Q
Histogram
A
- no gaps between columns
- half a column ap at the start
15
Q
medicare
A
2% but normally will be specified
