Central tendency

What is the mode?

• The value that occurs the most often in a data set
• The middle number in an ordered set of data
• The sum of all the numbers in a data set divided by the size
• The sum of the between the greatest and the least elements, divided by two

Which is the MIDDLE of an ordered set of data?

• Mean

• Median

• Mode

• Range

Which is a synonym for "average?"

• mean

• median

• mode

• range

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

• Pick your favorite number
• Add the two numbers in the middle & then divide by two.
• They are both the median
• None of the above

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 would influence the mean too much.

• Mean, because you should always use the mean.

• There is not a best measure of central tendency for this data.

The number of pages that Carolyn wrote in her journal each day from Monday to Friday is shown below: 
9, 8, 12, 6, 10
What is the mean number of pages she wrote per day?

• 5
• 6
• 9
• 11

What is the mode?

4 , 8 , 5 , 17 , 5 , 4 , 9 , 5 , 6 , 82

• 4

• 9

• 6

• 5

• spread

• mean

• outlier

• median

DATA SET:

3, 7, 24, 3, 7, 7, 1, 3, 7, 3

find the mode

• 3 and 7 both are modes

• There is no mode

• 3 only

• 7 only

Find the range.
12, 5, 9, 18, 22, 25, 5

• 20
• 15
• 22
• 18