Examlex
The probabilities shown in a table with two rows, and
and two columns,
and
,are as follows: P(
and
) = 0.10,P(
and
) = 0.30,P(
and
) = 0.05,and P(
and
) = 0.55.Then P(
|
) is
Mean of a Sample
The average value obtained by dividing the sum of all observations in a sample by the number of observations.
Mean of a Population
The average value derived from adding all the values in a population and then dividing by the number of values.
Null Hypothesis
A default hypothesis that there is no effect or no difference, used as a starting point for statistical significance testing.
One-sample Z-test
A statistical test used to determine if the mean of a single sample differs significantly from a known or hypothesized population mean.
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