Professor Naomi Lowe explains how Z-scores relate to the normal curve. Z-scores provide information about one score relative to other scores. The Z table represents values under the normal curve.
The Z table is used to determine the percentage a Z score is from the mean and what area remains in the tail under the normal curve. Lowe demonstrates how to use the Z table.
To calculate the percentage area above or below a raw score or Z score, first draw a normal curve, estimate where the Z score falls, and shade the area. Lowe works through examples using the Z table.
Lowe walks through the steps to calculate a Z score or raw score when only a percentage is provided.
A population includes all members of a defined group, and a sample is a part of the population used to draw conclusions about the population. Methods of sampling include random and haphazard selection. Sample statistics are used to draw conclusions about population parameters.
Probability is the expected relative frequency of a particular outcome with a range of 0 to 1. The equation for probability is the possible successful outcomes divided by all possible outcomes.
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In this video lecture, Professor Naomi Lowe explains how Z-scores relate to the normal curve, discusses samples and population, and looks at probability.
Length: 37 minutes
Copyright date: ©2010
Prices include public performance rights.
Not available to Home Video and Publisher customers.
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