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  • DIG Stats: Excel Guide for Determining the Confidence Interval

    This tutorial explains in detail how to find a confidence interval using Excel.

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  • DIG Stats: TI-83 Guide for Determining the Confidence Interval

    This tutorial explains in detail how to find a confidence interval using the TI-83 graphing calculator.

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  • DIG Stats: Excel Guide for Making a 3-D Graph

    This tutorial explains in detail how to make a 3-D graph using the Chart Wizard in Excel.

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  • DIG Stats: Cloud Seeding Activity

    In this activity, students will perform a two-way ANOVA on a dataset containing rainfall amounts for seeded and unseeded clouds in each of the 4 seasons. Questions about the exercise are given as well as a link to Excel instructions. The data exist in Excel and text formats.

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  • Dataset Example: DIG Stats: Acid Rain Activity

    In this activity, students will perform a one sample t-test to see if the pH level of rain collected by the EPA is less than the pH standard for acid rain (5.6). Questions about the exercise and links to a t-test applet and TI-83 instructions are given. The data exist in Excel, TI-83, and text formats.

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  • DIG Stats: Health Insurance Activity

    In this activity, students will perform a chi-squared test on the number of people with health insurance by age to determine whether there is a relationship between age and insurance coverage. Questions about the exercise and a link to the DIG Stats Online Chi-Squared Calculator are given. The data exist in Excel and text formats.

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  • DIG Stats: Football Activity

    In this activity, students will perform a t-test to determine if there is a significant difference between the kicking distances of a football filled with helium and one filled with regular air. Questions about the exercise and links to Excel and TI-83 instructions are given. The data exist in Excel, TI-83, and text formats.

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  • DIG Stats: Coliform Activity

    In this activity, students will perform a t-test to see if fecal coliform counts collected from Blackwater Creek in Lynchburg, Virginia differ before and after rain showers. Questions about the exercise and links to Excel and TI-83 instructions are given. The data exist in Excel, TI-83, and text formats.

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  • DIG Stats: Seed Harvester Ant Activity

    In this activity, students will calculate confidence intervals for the mean weight (in milligrams) of seed harvester ants for 4 size classes of the ants. Questions about the exercise and links to Excel and TI-83 instructions are given. This data exists in Excel, TI-83, and text formats.

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  • Regression to the Mean

    This is a simulation illustrating the regression toward the mean phenomenon.

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