Chapter 1: Basic Statistical Concepts Flashcards
What is the evidence or life of statistics called?
Data
What is statistics in a singular sense?
The body of knowledge concerned with the collection, organization, presentation, analysis, and interpretation of data.
What is statistics in the plural sense?
A collection of facts and figures or processed data.
Which type of statistics describes characteristics of data in some manner?
Descriptive Statistics
What is inferential statistics?
A generalization of a larger set based on a part that is examined. Its goal is to produce reliable estimation using appropriate statistical methods and protocols.
What is tracer study similar to?
Survey
What is a universe?
An entity whose characteristics are to be studied.
What is an infinite universe?
A universe where you cannot identify everything in a given period of time.
A characteristic of interest that is measurable on each and every unit of the universe.
Variable
What is a set of all possible values of the variable?
Population
What is a subset of the population/universe?
Sample
What are qualitative variables?
Nominal and Ordinal
What are quantitative variables?
Ratio and Interval
What are the 3 types of data collection?
- Objective
- Subjective
- Use of Existing Records
What are the types of data presentation?
- Textual
- Tabular
- Graphical
What are modern types of data presentation?
Infographics and Data Storytelling
What happens to L if it is a whole number?
Get the mean of L and L+1.
What happens to L if it is not a whole number?
Round up.
Formula for quantiles.
(J/# divisions) N
Formula for Range (R).
Maximum - Minimum
Formula for Interquartile Range (IQR).
Q3 - Q1
Formula for Coefficient of Variation (CV).
(standard deviation/mean) 100
Formula for Skewness (SK).
3 (mean) - median, all over standard deviation
