Examlex
What is the connection between the values of the Democratic Party and the issue of slavery during the 1820s and 1830s?
Z-test
A Z-test is a statistical test used to determine whether two population means are different when the variances are known and the sample size is large.
Sample Mean
The sample mean is the average value of a sample set of numbers, calculated as the sum of the individual values divided by the number of values in the sample.
Population Mean
The average of all the items in a population, representing the central tendency.
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