Statistics Center and Variability

The two measures of center we've study this unit are...

• Interquartile Range

• Mean Absolute Deviation

• Mean

• Median

• Standard Deviation

Interquartile Range or IQR is a measure of variability and helps determine the spread of the data.

• True

• False

If our data set is skewed to the right or left we would measure the center by calculating the...

• Mode

• Mean

• Median

• Range

A typical value is found by using either the...

• MAD

• Mean

• Standard Deviation

• Median

If we use the mean to measure the typical value or center of the data, we would use the _________ to measure the variability.

• IQR

• Median

• Mean

• Standard Deviation

If we use the median to measure the typical value or center of the data, we would use the _________ to measure the variability.

• Mode

• MAD

• Standard Deviation

• IQR or Interquartile Range

The median is the...

• average of all data values

• the most frequently occurring number

• the difference between the biggest and smallest value

• the middle value

A box plot divides the data into quarters or 25% increments.

• True

• False

The total number of data values in this histogram is...

• 11

• 7

• 4

• 15

• 25

The mean gets pulled away from the center of data or the typical value when the data is skewed to the right or left.

• True

• False