9.4 Measures of Central Tendency

The Mean, Median, Mode, and Range are also known as?

• Measures of central tendency

• Middle values

• Center values

• Tendency of the middle

What is the mode?

• The middle number in an ordered set of data.

• The difference between the greatest and least amount in the data set

• The value that occurs the most often in a data set

• The sum of all the numbers in a data set divided by the size

Which is a synonym for "average?"

• median

• mode

• range

• mean

What do you do if there are two numbers in "the middle" when you are finding the median?

• Pick your favorite number

• They are both the median

• Find the mean of the two numbers

• None of the above

What is the first step when looking at a data set?

• Find the mean

• Sort the data into categories

• Find the range

• Put the data in ascending order

What measure of central tendency (mean, median or mode) would be best for the following set of data?
0, 89, 92, 97, 99, 100

• Mode, because it is the one that shows up the most.
• Median, because there is an outlier.  The outlier could be incorrect and would influence the mean too much.
• Mean, because there is not an outlier.  You should always use the mean.
• There is not a best measure of central tendency for this data.

What measure of central tendency (mean, median or mode) would be best for the following set of data?
0, 89, 92, 97, 99, 100

• Mode, because it is the one that shows up the most.
• Median, because there is an outlier.  The outlier could be incorrect and would influence the mean too much.
• Mean, because there is not an outlier.  You should always use the mean.
• There is not a best measure of central tendency for this data.

The salary of the employees in the office were $15,000; $18,000; $16,000; $14,000; $90,000; and $17,000.  What is the best measure of the central tendency of the salaries?

• Mean
• Median
• Mode
• Range

Harley surveyed his classmates about how many siblings they have and got the following data: 0, 1, 3, 4, 2, 2, 1, 2, 0, 1, 1, 1, 1, 3 Which is the best measure of the central tendency of the data?

• Mean

• Median

• Mode

• Range

The hourly salaries of the workers at a restaurant are shown below.
$7.75, $8.50, $7.25, $9.00, $30.00, $8.25, $7.75, $9.00
Which statement is true?

• The worker who earns $7.25 an hour causes the mean to be a better representation of the typical salary than the median.
• The worker who earns $7.25 an hour causes the median to be  a better representation of typical salary than the mean.
• The worker who earns $30.00 an hour causes the mean to be a better representation of the typical salary than the median.
• The worker who earns $30.00 an hour causes the median to be a better representation of the typical salary than the mean.