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Statistics: Chapter 1
by Jane_l Yang
# Statistics: Chapter 1

## It can be used to tell a story, such
as, does Aspirin cause heart
attacks?

## Opens doors to knowledge

## It makes logical sense of numbers by
organizing them in an easy-to-read
way

## May suprise you by being fun

## What is Statistics?

### Principles & Procedures for
collecting & studying data to make
decisions

## Morals

### Simple Summaries

### Representative Sample

### Unrepresentative Sample

### Observational Study

### Randomized Experiments

### Rate and Risk

### Statistical Significance vs
Practical Importance

## Discovery of Knowledge

### Ask the Right ?'s

### Collect Useful Data

### Summarize and Analyze Data

### Make Decisions and Generalizations

### Turn Data and Decisions into
Knowledge

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Statistics is a collection of procedures and principles for gathering data and analyzing information to help make decisions when faced with uncertainty.

Easier to digest than long lists.

Median

Lower Quartile

Upper Quartile

Population

Random Sample

Sample Survey

Margin of Error

Non Response Bias

Self-Selected (Volunteer) Sample

Cause and Effect conclusions not generally made.

Variable

Confounding Variable

Cause and effect conclusions usually made

Treatment

Random Assignment

Placebo

Statistical Significance

When discussing change in rate and risk, be sure to mention baseline.

Base (Baseline) Risk

Statistical significance not always practically important. Be sure to find out the magnitude of the relationship or difference.