Normal Distribution

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 percentage of data falls within 2 standard deviations in a normal distribution?

Back

95%

Front

What percentage of data falls within 3 standard deviations in a normal distribution?

Back

99.7%

Front

What is the mean in a normal distribution?

Back

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

Front

What is a standard deviation in a normal distribution?

Back

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

Front

What does it mean if data is normally distributed?

Back

The data follows a bell-shaped curve where most values cluster around the mean.

Front

What is the empirical rule?

Back

A statistical rule stating that for a normal distribution, approximately 68% of data falls within 1 standard deviation, 95% within 2, and 99.7% within 3.

Front

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

Back

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

Front

What is a z-score?

Back

A measure of how many standard deviations an element is from the mean.