How-To Guides
Step-by-step guides that teach you how to perform calculations manually.
How to Calculate Normal Distribution Probabilities: Step-by-Step Guide
Calculate normal distribution probabilities manually
Read guideHow to Calculate Cohen's D: Step-by-Step Guide
Calculate Cohen's D manually
Read guideHow to Calculate R-Squared: Step-by-Step Guide
Learn to calculate R-squared manually
Read guideHow to Calculate Spearman Correlation: Step-by-Step Guide
Learn to calculate Spearman rank correlation manually
Read guideHow to Calculate Pearson Correlation: Step-by-Step Guide
Calculate Pearson correlation manually
Read guideHow to Perform a Two-Sample t-Test: Step-by-Step Guide
Learn to perform a two-sample t-test manually
Read guideHow to Perform a Chi-Square Test: Step-by-Step Guide
Learn to calculate chi-square by hand
Read guideHow to Calculate Margin of Error: Step-by-Step Guide
Calculate margin of error for survey results
Read guideHow to Calculate Sample Size: Step-by-Step Guide
Learn to manually calculate the minimum sample size for surveys and experiments using confidence level, margin of error, and population.
Read guideHow to Create a Stem and Leaf Plot: Step-by-Step Guide
Learn to manually create a stem and leaf plot from any dataset, understand its formula, and avoid common pitfalls. Visualize your data easily!
Read guideHow to Calculate Vote Percentage: Step-by-Step Guide
Learn to calculate vote percentage by hand! This guide provides the formula, a worked example, common pitfalls, and when to use a calculator for quick, accurate results.
Read guideHow to Calculate Your GPA: Step-by-Step Guide
Learn to calculate your Grade Point Average (GPA) manually with this easy-to-follow guide. Includes the formula, a worked example, and common pitfalls.
Read guideHow to Calculate Your Grade: Step-by-Step Guide
Learn to calculate your course grade manually using the weighted average formula. Understand inputs, formulas, and common pitfalls.
Read guideHow to Calculate Coin Flip Probabilities Manually: Step-by-Step Guide
Learn to manually track coin flip results and calculate running probabilities. Understand theoretical vs. experimental probability with a fair coin.
Read guideHow to Manually Generate Random Numbers: Step-by-Step Guide
Learn to manually generate random numbers within any range, with or without repetition. Understand the process and when to use a calculator.
Read guideHow to Calculate Descriptive Statistics: Step-by-Step Guide
Learn to manually calculate mean, median, mode, variance, standard deviation, and percentiles for any dataset. Master the basics of descriptive statistics!
Read guideHow to Manually Pick a Random Name: Step-by-Step Guide
Learn to manually pick random names from a list with equal probability. Follow our guide for fair results using simple tools.
Read guideHow to Calculate the Sum, Average, Count, Minimum, and Maximum of Numbers: Step-by-Step Guide
Learn to manually calculate the sum, average, count, min, and max of any list of numbers. Master the formulas with a simple, step-by-step example!
Read guideHow to Calculate Z-Score: Step-by-Step Guide
Learn to calculate Z-score by hand with our step-by-step guide. Understand the formula, worked examples, common pitfalls, and when to use a calculator.
Read guideHow to Calculate Variance: Step-by-Step Guide
Learn to calculate statistical variance by hand with this step-by-step guide, including formula, a worked example, and common pitfalls.
Read guideHow to Calculate Percentile Rank: Step-by-Step Guide
Learn to calculate percentile rank by hand! This guide explains the formula, provides a worked example, and covers common pitfalls. Understand where your data stands.
Read guideHow to Calculate Quartiles and IQR: Step-by-Step Guide
Learn to calculate quartiles (Q1, Q2, Q3) and the Interquartile Range (IQR) by hand with a simple, step-by-step guide and example.
Read guideHow to Calculate the Average (Arithmetic Mean): Step-by-Step Guide
Learn to calculate the arithmetic mean (average) step-by-step by hand. Includes formula, worked example, common pitfalls, and when to use a calculator.
Read guideHow to Calculate Your Test Grade: Step-by-Step Guide
Learn to manually calculate your test grade percentage and letter grade. Understand the formula, follow a worked example, and avoid common mistakes.
Read guideHow to Calculate a Confidence Interval: Step-by-Step Guide
Learn to calculate confidence intervals manually
Read guideHow to Calculate Standard Deviation: Step-by-Step Guide
Learn to calculate variance and standard deviation manually
Read guideHow to Calculate Mean, Median, and Mode: Step-by-Step Guide
Learn to calculate mean, median, and mode manually
Read guideHow to Calculate Statistics: Step-by-Step Guide
Learn statistics manually
Read guideTax and Tip Combined Calculator: Step-by-Step Guide
Calculate tax and tip combined quickly and accurately
Read guideHow to Calculate Selling Price with a Mark-Up Calculator: Step-by-Step Guide
Calculate selling price manually
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