Normal Distribution

Front

What shape is a normal distribution curve?

Back

Bell curve

Front

What is the total area under the standard normal distribution curve?

Back

1

Front

What is the Normal Range (68%) of the annual precipitation for Phoenix, if the average is 29 with a standard deviation of 3?

Back

26-32

Front

Which best describes the shaded part of this normal distribution graph?

Back

All data that is one or more standard deviations above the mean.

Front

The mean number of accidents a week at a company is 6.4 with a standard deviation of 1.5. What proportion of weeks would you expect to have more than 7 accidents?

Back

0.3446

Front

What is the mean in a normal distribution?

Back

The average value around which data points are distributed.

Front

What does standard deviation measure in a normal distribution?

Back

The amount of variation or dispersion of a set of values.

Front

What percentage of data falls within one standard deviation of the mean in a normal distribution?

Back

Approximately 68%.

Front

What is the empirical rule in statistics?

Back

A rule stating that for a normal distribution, about 68% of data falls within one standard deviation, 95% within two, and 99.7% within three.

Front

What is a z-score?

Back

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