This is the seventh page of the series of free video lessons, "Statistics Lectures".
Statistics - Lecture 18
Z-Scores (part one)
Statistics - Lecture 19
Z-Scores (part two)
Z-scores are standardized values that can be used to compare scores in different distributions.
Statistics - Lecture 20
Extra Z-Score Problems
In the United States, the average IQ is 100, with a standard deviation of 15.
What percentage of the population would you expect to have an IQ lower than 85?
What percentage of the population would you expect to have an IQ between 90 1nd 120?
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