Regression in 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...
Descriptive Statistics in TI-84
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...
Descriptive Statistics in TI-84
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...
Probability Distributions in TI-84
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...
Descriptive Statistics in TI-84
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...
Descriptive Statistics in TI-84
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...
Probability Distributions in TI-84
How to Calculate Poisson Probabilities on a TI-84 Calculator
The Poisson distribution is one of the most commonly used distributions in all of statistics. This tutorial explains how to use the following functions...
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