This tutorial contains links to a very incomplete collection
of topics. The discussion of each topic may be similarly
incomplete. For more complete exposition on these topics consult
your textbook and/or instructor. Course materials are currently
separated into 5 broad categories. To go directly to the menu for
the topic you are interested in, choose from the **Quick Search**
options. Or. . .browse the remainder of this page and see what's
available.

Producing Data |

## Topic |
## Description |
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Types of Variables | Terminology used in classifying the nature and use of variables. |

Histograms | Details of construction. |

Boxplots | Details of construction. |

68-95-99.7 Rule | The statement of the 68-95-99.7 rule for normal distributions. |

Pictures of Normal Curves | A page with nothing but pictures of normal curves. Print the page and use it whenever you solve problems involving normal distributions. |

Summary Statistics | Computing the median, percentiles, quartiles, interquartile range, mean and standard deviation. |

Prediction Intervals | How to obtain prediction intervals -- easily the easiest formal statistical method to learn. |

## Topic |
## Description |
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Correlation | Some plots I used for a talk on correlation. You can first "guess" the correlation; then view the correct answers. |

2-way Tables | How to display the information in a 2-way cross-classification of categorical data. |

Association in 2-Way Tables | What it means to say that two categorical variables are "associated." |

Anscombe's Data | Four data sets, in text form -- to be copied and pasted into a spreadsheet. For each of the four, obtain a linear regression and the correlation. Then compare. |

## Topic |
## Description |
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Cumulative Probabilities | What they are, how their tabled, and how they relate to probability distributions. |

Sampling Distributions for Sample Means | The basic results, including the central limit theorem. |

## Topic |
## Description |
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Significance Testing | A short primer on how a significance test (or hypothesis test -- same thing) proceeds. |

Tests of Association in 2-Way Tables | Using the Chi-Square test to determine if association exists in a population when data is collected in a 2-way table. |

CIs and tests for the mean of a population | A short description of the 1-sample inferences when data is quantitative. |