Appropriate Measures of Central Tendency and Variability

What is the range of the set of data?

• 70

• 65

• 80

• 55

The prices at several different stores for a pair of shoes are shown below.
$78, $79, $81, $82, $83
Two days later, another store has the same shoes on sale for $65. How does the new price affect the data?

• Only the range was affected.

• The median increased, and the range increased.

• The mean increased, and the range increased.

• The mean decreased and the range increased.

A value that is much higher or much lower than the other values in a set of data.

• Outlier

• Mean

• Median

• Mode

Identify the outlier for the given data?

23, 34, 27, 7, 30, 26, 28, 31, 34

• 7

• 23

• 31

• 34

The MEAN is the most effective measure of central tendency EXCEPT when _?

• when an outlier is present in the data set

• when there is no mode

• when there is NOT an outlier in the data set

• When the range is not measureable

What does CENTRAL TENDENCY measure?

• The trend in a data set.

• A way of describing the mid most point of a data set.

• The outliers identified in a data set

• None of the above

If 20 is added to the data set below, which statement will be true?
50, 55, 55, 60, 62

• The median will be 20

• The mode will increase

• The mean will increase

• The mean will decrease

What is the outlier in the following data?

• 22

• 8

• 37

• 22

Which measure of center best represents this set of data?
12, 13, 11, 16, 31, 14, 10, 15

• Mean

• median

• mode

What measure of center is best to use when we have outliers?

• mean

• median

• mode

• range