Normal Model Classwork

Front

What does the z-score represent?

Back

The amount of standard deviations a data value is above or below the mean.

Front

What percentage of data is in the shaded region if it represents 34%?

Back

34% of the data is in the shaded region.

Front

What shape is a normal distribution curve?

Back

Bell curve.

Front

What is the purpose of z-scores?

Back

To describe the exact location of a score within a distribution.

Front

According to the empirical rule, how much of the data falls within 3 standard deviations?

Back

99.7%.

Front

What is a normal distribution?

Back

A probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean.

Front

What is the mean in a normal distribution?

Back

The average of all data points, located at the center of the distribution.

Front

What is standard deviation?

Back

A measure of the amount of variation or dispersion in a set of values.

Front

What does the empirical rule state?

Back

In a normal distribution, approximately 68% of the data falls within 1 standard deviation, 95% within 2 standard deviations, and 99.7% within 3 standard deviations.

Front

What is the significance of the area under the normal curve?

Back

It represents the total probability of all outcomes, which equals 1.