A one-sample z-interval is a statistical method used to estimate the population proportion when only one sample is available. It calculates a confidence interval for the proportion using the standard normal distribution.
Related terms
Confidence Interval: A range of values calculated from sample data that provides an estimate of where the true population parameter lies.
Standard Normal Distribution: A symmetrical bell-shaped curve with mean 0 and standard deviation 1, often represented by the letter Z.
Sampling Error: The difference between a sample statistic (like a proportion) and its corresponding population parameter due to random sampling variation.