tillitsintervall
A confidence interval, or tillitsintervall in Norwegian, is a range of values that is likely to contain the true value of a population parameter. It is calculated from sample data and is used to estimate an unknown population characteristic, such as the population mean or proportion. The confidence level, often expressed as a percentage, indicates the probability that the interval contains the true parameter if the same sampling procedure were repeated many times. Common confidence levels are 90%, 95%, and 99%.
The width of a confidence interval is influenced by two main factors: the variability of the data
Confidence intervals are essential tools in statistical inference, allowing researchers and analysts to quantify the uncertainty