An R Introduction to Statistics

Elementary Statistics with R

Tutorials on elementary statistics with R.

Hypothesis Testing

fractal-10h Researchers retain or reject hypothesis based on measurements of observed samples. The decision is often based on a statistical mechanism called hypothesis testing. A type I error is the mishap of falsely rejecting a null hypothesis when the null hypothesis is true. The probability of committing a type I error is called the significance level of the hypothesis testing, and is denoted by the Greek letter α .

Sampling Size of Population Proportion

A tutorial on computing the sampling size for the desired margin of error of population proportion estimate at given confidence level.

Point Estimate of Population Proportion

A tutorial on computing the point estimate of population proportion from a simple random sample.