P&S Unit 7 Review

Front

What is the area under the normal distribution curve between z = -1.26 and z = 0.57?

Back

0.6119

Front

How do you calculate the Z-score?

Back

Z = (x - mean) / standard deviation

Front

What is the Z-score for x = 29, mean = 22, and standard deviation = 3.1?

Back

2.26

Front

What is P(Z < -0.39)?

Back

0.3483

Front

What is P(Z > 1.78)?

Back

0.0375

Front

What is the Z-score for x = 22, mean = 21, and standard deviation = 1.3?

Back

0.77

Front

Define the normal distribution.

Back

A probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean.

Front

What is the significance of the Z-score in statistics?

Back

It indicates how many standard deviations an element is from the mean.

Front

What does a Z-score of 0 indicate?

Back

The value is exactly at the mean.

Front

What is the total area under the normal distribution curve?

Back

1 (or 100%)