Chapter 1&2 Flashcards
Calculated result of
Population / Sample
Parameter / Statistic
Statistics studies
based on
fact / prediction
Descriptive / Inferential
Statistics
Data reported
with / without
interfering or manipulation
Experimental / Observational
Studies
Among Quantative data,
Countable values &
might incl. decimals
Discrete Variables
Among Quantative data,
Measurable values &
might incl. decimals
Continuous Variables
Qualitative data of
Names & Labels
without Ranking
(4 levels of measurement)
Nominal level data
Qualitative data of
Names & Labels
with Ranking
(4 levels of measurement)
Ordinal level data
Quantitative numerical data with
0 on Number Line
(4 levels of measurement)
Interval level data
Quantitative numerical data with
0 = None
(4 levels of measurement)
Ratio level data
5 Sampling Methods
- Simple Random Sampling
-
Stratified Sampling
Sample from the groupeds -
Cluster Sampling
Sample the groupeds -
Systematic Sampling
k≈N/n (round down)
N: Population ct.
n: Sample ct. - Convenience Sampling
Table that lists categories and their counts / fraction of the total
Frequency Distribution /
Relative Frequency Distribution
Bar chart that arranges nominal data in decreasing order
Pareto Chart
Two Way Table uses which chart ?
Clustered Bar Chart
Positive Skewed
vs Negative Skewed
Histogram
Peak at the Left
vs
Peak at the Right
When constructing
Freq. Distribution
How to determine
Number of Classes
& Class Width
Useful guide:
2ᵏ > n
→ k > ㏑n/㏑2
(Round UP)
Width = (Max - Min) / k
