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Discuss the difference between the 95% and the 99% confidence intervals.
Populations
In statistics, populations refer to the entire group of individuals or items of interest from which a statistical sample is drawn for analysis.
Z-test
A statistical analysis designed to identify variations between the means of two distinct populations, provided that the variances are predetermined and the size of the sample is substantial.
T-test
A statistical test used to compare the means of two groups or to compare a sample mean to a known value when variances are known or assumed to be equal.
Population Variances
Population variances measure the variability or spread of a population's data points from its mean, indicating how much the population data values differ from each other.
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