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Thursday, July 24, 2025

TI-84

How to Create a Residual Plot on a TI-84 Calculator

A residual plot is used to assess whether or not the residuals in a regression analysis are normally distributed and whether or not...

How to Find Sample Variance on a TI-84 Calculator

The sample variance tells us how spread out the values are in a given sample. Typically denoted as s2, it is calculated as: s2 = Σ...

How to Find Coefficient of Variation on a TI-84 Calculator

A coefficient of variation, often abbreviated as CV, is a way to measure how spread out values are in a dataset relative to the...

How to Use geometpdf() and geometcdf() on a TI-84 Calculator

The geometric distribution describes the probability of experiencing a certain number of failures before experiencing the first success in a series of trials that...

How to Find Interquartile Range on a TI-84 Calculator

The interquartile range, often denoted IQR, is a way to measure the spread of the middle 50% of a dataset. It is calculated as the difference...

How to Find a Five Number Summary on a TI-84 Calculator

A five number summary is a way to summarize a dataset using the following five values: The minimum The first quartile The median The third quartile The maximum By simply...

Chi-Square Goodness of Fit Test on a TI-84 Calculator

A Chi-Square Goodness of Fit Test is used to determine whether or not a categorical variable follows a hypothesized distribution. This tutorial explains how to perform a Chi-Square...

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