Front

What is a z-score?

Back

Front

How do you calculate a z-score?

Back

Front

What does a positive z-score indicate?

Back

A positive z-score indicates that the value is above the mean.

Front

What does a negative z-score indicate?

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A negative z-score indicates that the value is below the mean.

Front

What is the mean in a normal distribution?

Back

The mean is the average of all data points in a normal distribution and is the center of the distribution.

Front

What is the standard deviation in a normal distribution?

Back

The standard deviation measures the dispersion or spread of the data points around the mean in a normal distribution.

Front

What is the empirical rule (68-95-99.7 rule)?

Back

The empirical rule states that in a normal distribution: about 68% of data falls within 1 standard deviation of the mean, 95% within 2 standard deviations, and 99.7% within 3 standard deviations.

Front

How do you find the area under the normal curve?

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The area under the normal curve can be found using the standard normal table (Table A) or by calculating z-scores and using statistical software.

Front

What is the purpose of the standard normal table?

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The standard normal table provides the area (probability) to the left of a given z-score in a standard normal distribution.

Front

What is the formula for converting a raw score to a z-score?

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