Flashcardizz Review - Standard Normal Curve

Front

What percent of the data is within one standard deviation of the mean in a normal distribution?

Back

68%

Front

What percent of the data is within two standard deviations of the mean in a normal distribution?

Back

95%

Front

What percent of the data is within three standard deviations of the mean in a normal distribution?

Back

99.7%

Front

What is the definition of Standard Deviation?

Back

A measurement of how much data varies from the average.

Front

What does a z-score represent in a normal distribution?

Back

The number of standard deviations a data point is from the mean.

Front

What is the z-score for the 50th percentile in a standard normal distribution?

Back

0

Front

How do you find the area under the standard normal curve between two z-scores?

Back

Use a z-table or standard normal distribution calculator.

Front

What is the mean of a standard normal distribution?

Back

0

Front

What is the standard deviation of a standard normal distribution?

Back

1

Front

If a z-score is -1.5, what does it indicate about the data point?

Back

The data point is 1.5 standard deviations below the mean.