Properties of the Normal Distributions (5.1)

Front

What shape is a normal distribution curve?

Back

Bell curve

Front

According to the empirical rule, what percentage of data falls within 1 standard deviation?

Back

68%

Front

What does the TOTAL area under the normal distribution curve add up to (in decimal form)?

Back

1.00

Front

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

Back

99.7%

Front

Describe the shape of the graph of a normal distribution.

Back

Symmetrical

Front

What is the mean in a normal distribution?

Back

The average value of the data set, located at the center of the bell curve.

Front

What is the standard deviation in a normal distribution?

Back

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

Front

What percentage of data falls within 2 standard deviations according to the empirical rule?

Back

95%

Front

What is the significance of the inflection points in a normal distribution curve?

Back

They indicate where the curve changes concavity, located at one standard deviation from the mean.

Front

What is a z-score in the context of normal distribution?

Back

A measure that describes a value's relationship to the mean of a group of values, expressed in terms of standard deviations.