Normal distribution

Front

What shape is a normal distribution curve?

Back

Bell curve

Front

A set of scores with a normal distribution has a mean of 76 and a standard deviation of 5. Approximately what percent of the scores fall in the range of 71 to 86?

Back

81.5%

Front

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

Back

68%

Front

How is the graph distributed?

Back

Skewed to the Left

Front

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

Back

99.7%

Front

What is the mean in a normal distribution?

Back

The average value of the dataset, where the curve is centered.

Front

What is standard deviation in a normal distribution?

Back

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

Front

What does the empirical rule state about data distribution?

Back

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, which equals 1.

Front

What does it mean if a distribution is skewed to the right?

Back

The tail on the right side is longer or fatter than the left side.