4.1.3 How to Read the z-table Practice

Front

What is the standard deviation of the distribution of z-scores?

Back

1

Front

What does the sign of a z-score indicate?

Back

Whether the location is above (positive) or below (negative) the mean.

Front

If P(Z < k) = 0.2250, what is the value of k?

Back

-0.755

Front

What is the value of p(z < -2.37)?

Back

.0089

Front

What z-score corresponds to 95.73% of the data to the left?

Back

1.72

Front

What is a z-score?

Back

A z-score measures the number of standard deviations a data point is from the mean.

Front

How do you interpret a positive z-score?

Back

A positive z-score indicates that the data point is above the mean.

Front

How do you interpret a negative z-score?

Back

A negative z-score indicates that the data point is below the mean.

Front

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

Back

1 (or 100%)

Front

What is the significance of the z-table?

Back

The z-table provides the area (probability) to the left of a given z-score in the standard normal distribution.