Examlex
The Facebook experiment that deliberately varied the kinds of emotional content posted on users' news feeds did not require IRB review because
Standard Error
A measure of the statistical accuracy of an estimate, often the standard deviation of the sampling distribution of a statistic.
Critical Values
These are threshold points on the scale of the test statistic that delineate the region where the null hypothesis is rejected, essential in determining the significance of the test outcome.
Alpha
The significance level, a threshold used in hypothesis testing indicating the probability of rejecting the null hypothesis when it is true.
Degrees of Freedom
The number of independent values or quantities which can be assigned to a statistical distribution or a statistical calculation.
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