Examlex
Which function is best suited to return the specified number of characters from the middle of a text string?
Sample Size
The number of observations or data points collected in a statistical sample.
Degrees of Freedom
The count of independent pieces of information available to estimate another statistic, crucial in defining the distribution of various test statistics.
Contingency Table
A table used in statistics to display the frequency distribution of variables to show the relationship between them.
Level of Significance
The probability of rejecting the null hypothesis in a statistical test when it is in fact true; commonly set thresholds include 0.05 or 0.01.
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