Joseph Mburu
Joseph is an applied statistician and data analyst with over 6 years of experience helping students, researchers, and professionals solve statistics and data analysis problems. He holds a degree in Applied Statistics and a Master’s degree in Data Science and Analytics. Through StatCalc.net, Joseph creates accurate, easy-to-use statistics calculators that not only give correct results but also explain each formula step by step, helping users truly understand how the calculations work.
Latest Articles by Joseph Mburu
Yamane’s Sample Size Calculator
January 8, 2026
This Yamane sample size calculator uses Taro Yamane’s formula to determine the minimum sample size required from a finite population. Simply enter the population size (N), choose the margin of error (e) as a decimal, and click the Calculate button. The calculator instantly applies Yamane’s formula to give you the minimum sample size for your […]
Read MoreZ Critical Value Calculator
January 5, 2026
This calculator finds the z critical value from the standard normal distribution for a given significance level (α). Simply enter the significance level (in decimal form) and click the “Calculate” button. The calculator will give you z critical values for left-tailed, right-tailed, and two-tailed tests. It will also provide you with a brief explanation of […]
Read MoreSlovin’s Formula Calculator
January 3, 2026
This calculator computes the minimum sample size needed for your study using Slovin’s formula. You only need to enter the population size and the proposed margin of error (in decimals), and the calculator will calculate the sample size for you. It will also provide you with a clear explanation of how to apply Slovin’s formula […]
Read MoreStandard Deviation Calculator
January 3, 2026
This calculator computes the sample standard deviation or the population standard deviation for any data and shows you how to compute the standard deviation manually. Here’s how it works: The calculator provides an accurate answer along with an explanation of how to compute the standard deviation by hand. What is Standard Deviation? Standard deviation is […]
Read MoreSample Mean Calculator
December 22, 2025
This calculator helps you find the sample mean of any dataset without manual computations. Simply enter your data values as comma-separated, space-separated numbers, or even paste them directly from Excel, and click the Calculate button. The calculator will compute the sample mean and demonstrate how to calculate it by hand. What is a Sample Mean? […]
Read MoreCochran’s formula Calculator
December 11, 2025
This calculator uses Cochran’s formula to calculate the minimum sample size for a study. It works for both infinite and finite populations by using the confidence level, margin of error, and population proportion. When a population size is provided, the calculator applies the finite population correction (FPC). In addition to the final result, it shows […]
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