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# This is stat class made simple.

Welcome to statmagic, a statistics calculator app. With 11 unique calculators, memorable example problems, and help content developed from years of one-on-one tutoring, statmagic will help you learn — and get your homework done — faster.

Looking to learn stats from the ground up? Watch our introductory statistics video series.

# Watch statmagic in action:

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## Automatic Dataset Import (iOS PRO Only)

An exceedingly easy dataset import feature. Just open a spreadsheet in a spreadsheet app, copy the data onto your device's clipboard, and statmagic PRO can read it! Statmagic PRO can then help you select the correct test for your 1-sample, 2-sample, or paired data.

Descriptive Stats Screenshot

## Descriptive Statistics

The basics. Count, sum, min and max, mean, median, quartiles, variance, and standard deviation. Learn more.

Descriptive Stats Screenshot

## The Normal Distribution

Calculate Z or T scores and probabilities on the normal distribution, for a random individual (x), or even a random sample mean (x-bar). Learn more.

Normal Distribution Screenshot

## Hypothesis Testing

Individual calculators for:

Every calculator returns the 'reject Ho?' conclusion, p-value, critical test value, test score, standard error, and confidence interval.

The tests of mean also feature automatic graphics, so you can visualize what's going on.

Test of Mean Screenshot

## Confidence Intervals

Create confidence intervals for means or proportions at different levels of confidence.

Confidence Interval Screenshot

## Regression

Enter an x-y paired dataset, and this calculator automatically generates the scatterplot (and marks outliers (according to the 1.5 x IQR method)). Calculate, and it draws regression line and shows the "y = a + bx" formula.

It also returns r and R², F, RMSE, and SE, T and the p-value of the slope. Finally, you use the regression model to make a prediction: enter a chosen x* value, and this calculator returns (and plots) the predicted y-hat value (PRO only). Learn more.

Regression Test Screenshot

## Chi-Squared (PRO only)

Run a Chi-squared test on up to a 7x7 table. Easily toggle between the table's observed, expected, and Chi-squared values. Returns the 'reject Ho?' conclusion, p-value, Chi-square test value, and critical Chi-square value (with degrees of freedom). Learn more.

Chi-Squared Screenshot

## Minimum N

Calculate the required minimum sample size n for a given confidence level. Learn more.

Minimum N Interval Screenshot