Sensitivity of the Mean to Outliers

Usefulness of the Mean in Statistical Analyses

t-Test

Statistical Mean Formula

Hypothetical Population Mean

Formula for the Mean

z Score

Standard Deviation

Formula for the Mean

Which measure of central tendency is calculated by finding the sum of all scores in a distribution and dividing that sum by the total number of scores?

In a psychological study, if a researcher increases the value of one participant's score while keeping the total number of participants the same, the mean ($M$) of the distribution will also increase.

A researcher is comparing the number of errors made by four different groups of participants on a cognitive task. Based on the scores provided for each group, arrange the groups in order from the lowest mean (M) number of errors to the highest mean (M) number of errors.

A psychology researcher is evaluating how various modifications to a dataset impact the calculated mean ($M$). Match each modification to its specific logical consequence for the resulting mean.