Standard Normal Distribution

Front

What is the Z score for a value that is two standard deviations below the mean in a standard normal distribution?

Back

-2

Front

What is the probability of a value falling within one standard deviation of the mean in a standard normal distribution?

Back

68.27%

Front

What does a Z score represent?

Back

The number of standard deviations a data value is from the mean

Front

Joanne's Z-score is -1.5. What does this mean?

Back

She scored 1.5 standard deviations below the average.

Front

Which z-score corresponds to a probability of 0.3085?

Back

-0.4

Front

Define Standard Normal Distribution.

Back

A probability distribution with a mean of 0 and a standard deviation of 1.

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

How do you calculate a Z score?

Back

Z = (X - μ) / σ, where X is the value, μ is the mean, and σ is the standard deviation.

Front

What percentage of data falls within two standard deviations of the mean in a standard normal distribution?

Back

95.45%