Score is an old term meaning 20. Similarly, we still use dozen to mean 12 of anything. The most famouse example I know is when Abe Lincoln used "Four score and seven years ago" in a speech. It was a fancy way of saying 87 years. So 7 score of whatever you are counting would be 7x20=140 of them.
Chat with our AI personalities
87
87. A score is 20.
If the Z Score of a test is equal to zero then the raw score of the test is equal to the mean. Z Score = (Raw Score - Mean Score) / Standard Deviation
Yes. If a score is below the mean, the z score will be negative.
z-score of a value=(that value minus the mean)/(standard deviation). So if a value has a negative z-score, then it is below the mean.