This is a draft cheat sheet. It is a work in progress and is not finished yet.
Population
Contains all items of interest that one seeks to study. |
A parameter summarizes the value for a specific variable. |
Sample
Is a subset of the population. |
Is analysed to estimate characteristics of an entire population. |
The measurable quality is called a statistic. |
Reports have a margin of error and confidence interval. |
Types of variables
Quantitative |
Qualitative |
Data represent a counted or measured quantity |
Data represent categories |
Discrete
Data that arise from a counting process. |
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Continuous
Data that arise from a measuring process |
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Organizing and visualizing variables
Tables and charts for categorical data |
Tables and charts for numerical data |
Summary table |
Stem-and-leaf display |
Contingency table |
Histogram |
Bar chart |
Percentage polygon |
Pie chart |
Cumulative percentage polygon (Ogive) |
Doughnut chart |
Pareto chart |
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