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Confidence Intervals | Population Mean: σ Known

Confidence Interval Calculator: https://www.statssolver.com/confidenc... An interval estimate is constructed by adding and subtracting the margin of error from the point estimate. So to compute an interval estimate of the population mean, add and subtract the margin of error from the sample mean. When constructing an interval estimate, it is important to choose a confidence level, such as 95%. The confidence coefficient is the decimal form of the confidence level, so .95. An interval estimate constructed at a confidence level of 95% is called a 95% confidence interval. For confidence intervals of population mean: σ known, use the standard normal, or z, distribution. 0:00 - Introduction 2:00 - Definitions 3:50 - Formula 6:10 - Example