Appropriate Measure of Center

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.

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

Which is a good measure of center when the data contains an outlier?

• mean

• median

• mode

What is the mean of the data set: 44, 43, 42, 40, 42, 45, 39, 38, 18.ONLY TYPE IN A NUMBER

What is the median of the data set: 44, 43, 42, 40, 42, 45, 39, 38, 18.

ONLY TYPE IN A NUMBER

What is the mode of the data set: 44, 43, 42, 40, 42, 45, 39, 38, 18. ONLY TYPE IN A NUMBER

Data Set: 44, 43, 42, 40, 42, 45, 39, 38, 18.

Is the median or mean the best measure of center? Explain.

Choose the correct measure of center AND explanation.

• Median, because there is an outlier

• Median, because the data is clustered together

• Mean, because there is an outlier

• Mean, because the data is clustered together

Each of five different stores sell a quart of milk for the following prices:

$1.50, $1.55, $1.80, $1.70, $1.50

What is the mean?

• 1.55

• 1.7

• 1.61

• 2