SDC Measures of Center and Spread Vocabulary

Front

What is the smallest value in a data set called?

Back

min

Front

According to the Empirical Rule, what percentage of data values lie within one standard deviation of the mean?

Back

68%

Front

According to the Empirical Rule, what percentage of data values lie within two standard deviations of the mean?

Back

95%

Front

According to the Empirical Rule, what percentage of data values lie within three standard deviations of the mean?

Back

99.7%

Front

What does a negative z-score indicate about a data value?

Back

The data value is below average.

Front

What does a z-score of 0 indicate?

Back

The data value is exactly average.

Front

What is the formula for calculating a z-score?

Back

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

Front

What is the mean of a data set?

Back

The average of all data values.

Front

What is the median of a data set?

Back

The middle value when the data set is ordered.

Front

What is the mode of a data set?

Back

The value that appears most frequently.