Examlex
In general, the approaches and outcomes of cooperating groups are not just better than those of the average group member, but are better than even the group's best problem solver functioning alone.
Z-test
A statistical test used to determine whether two population means are different when the variances are known and the sample size is large.
µ = 15
Represents the mean of a population is equal to 15.
Z-statistic
A measure used in statistics to quantify the deviation of a data point or a group of data points from the mean, expressed in terms of standard deviations.
Two-tailed Test
A statistical test that allows for the exploration of relationships in both directions, enabling the detection of significant differences regardless of the direction.
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