Seasons & Episodes
What Is Statistics?
Statistics is the art and science of gathering, organizing, analyzing and drawing conclusions from data. And without rud
Stemplots
As a first step in visualizing data, we use stemplots to understand measurements taken by the U.S. Army when they size u
Histograms
Meteorologists use histograms to map when lightning strikes and this visualization technique helps them understand the d
Measures of Center
It's helpful to know the center of a distribution — which is what the clerical workers in Colorado Springs found out i
Boxplots
Using the example of hot dog calorie counts, we use boxplots to visualize the five-number summary and make comparisons b
Standard Deviation
How can we compare sales at two franchises in the Wahoo's restaurant chain? Standard deviation helps us quantify the var
Normal Curves
A nature preserve that's tracked bird migrations through New England for decades records tons of bird-related data; ever
Normal Calculations
Visit the Boston Beanstalks club for tall people. Height is normally distributed and we can use membership cutoffs and p
Checking Assumption of Normality
Production at Pete and Gerry's Organic Eggs provides a number of distributions that look normal — but are they?
Scatterplots
Plotting annual numbers of Florida powerboat registrations and manatee killings suggests an uncomfortable relationship f
Fitting Lines to Data
Winter snowpack in the Colorado Rockies can predict spring water supply. Plotting annual measurements in a scatterplot l
Correlation
Twin studies track how similar identical and fraternal twins are on various characteristics, even if they don't grow up
Two-Way Tables
One city surveyed the happiness of its residents. Two-way tables help organize the data and tease out relationships betw
The Question of Causation
This historical story describes how researchers untangled the relationship between smoking and lung cancer.
Designing Experiments
We move beyond observational studies — like one of marine life in the remote Line Islands — to designing experiments
Census and Sampling
The U.S. counts every resident every ten years — or at least tries to. Statisticians use sampling from a population as
Sample and Surveys
A visit to the University of New Hampshire Survey Center illustrates how pollsters create accurate surveys. They can the
Introduction to Probability
Probability is the mathematics of chance behavior — and can help predict events such as the daily weather, or whether
Probability Models
Casinos are as well versed in probability as statisticians and probability models help them maintain the house advantage
Random Variables
The Challenger space shuttle disaster was blamed on faulty O-rings. How can probability calculations on random variables
Binomial Distributions
Sickle cell disease is an example of binomial distribution in families with two parents who are carriers for this geneti
Sampling Distributions
Heights of third graders in one class. Quality scores for circuit boards at a factory. Taking multiple samples allows us
Control Charts
This quality control method helped Quest Diagnostics streamline and improve their system for processing and testing lab
Confidence Intervals
A battery manufacturer tests just a sample of its product to verify its claims about battery life. A margin of error and
Tests of Significance
Is a newly-discovered poem really written by William Shakespeare? Using statistical analysis of his known word use, rese
Small Sample Inference for One Mean
A brewer uses this technique to monitor quality differences in multiple batches of the same beer.
Comparing Two Means
Comparing the activity and calorie expenditure levels of Western office workers and African hunter gatherers adds some s
Inference for Proportions
Managers have no clue what conditions actually motivate their workers best, as shown by research conducted by Teresa Ama
Inference for Two-Way Tables
Host Dr. Pardis Sabeti's own research examines possible genetic resistance to deadly Lassa fever in West Africa. Using I
Inference for Regression
Historical story of how statisticians built the case against DDT as the culprit behind plummeting peregrine falcon popul
One-Way ANOVA
Does holding a heavier clipboard make you estimate that a jar of coins has more money in it than if you're holding a lig
Summary
This review of the course through the preceding 31 modules provides an overview of the practice of statistics and helps
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