Measures of Central Tendency

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?

• 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

If you score 76, 85, 97, and 83 on your math tests, what would your median score be? 

• 84

• 90

• 85

• 88

Match the following vocabulary with the definitions

• Mean

• the difference between the largest and smallest values in a data set

• Median

• the middle value, when the data is ordered from least to greatest

• Mode

• the most frequently occurring value(s)

• Range

• the average of values, sum of all values divided by how many values

What is the median of the following numbers? 1, 2, 2, 8, 9, 20

• 5

• Range

• 2

• Outlier

• 19

• Median

• 20

• Mean

• 7

• Mode

What is the MEDIAN of this data

Mathematical Equivalence

ON

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?

• 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.

A data set can have more than one _______

• Median

• Mode

• Mean

• Midrange