Measures of Central Tendency

The ____________ is the measure of central tendency that represents the middle number in a set of data.

• Mode

• Average

• Principal

• Median

In order to find the ____________, we add up all of the numbers in the data set and then divide the sum by the number of numbers.

• Average

• Mode

• Upper Quartile

• Median

The number that appears the most in a data set is commonly known as the ___________.

• Mean

• Range

• Mode

• Average

The following data set represents the responses from students when they were asked how many siblings they had:

1, 1, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 4, 7

What is the average number of siblings for this set of students?

• About 2.6

• 6

• About 18

• About 2.4

Match the following vocabulary with the definitions

• Range

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

• Mode

• the most frequently occurring value(s)

• Mean

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

• Measures of Central Tendency

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

• Median

• a value that describes the center or middle of a data set

Match the following from the data set:

• 20

• Median

• 15

• Mode

• 21

• Mean

• 16

• Range

What is the MEDIAN of this data

Mathematical Equivalence

ON

The frequency table shows the gas mileages of several vehicles. The data would be ​ (a)   so the best measure of center would be the ​ (b)   and the best measure of variation would be the ​ (c)   ​ ​

• Skewed Right

• median

• Interquartile Range

• Skewed Left

• Symmetrical

• Mean

• Mean Absolute Deviation

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

• 20

• Mode

• 7

• Outlier

• 19

• Median

• 5

• Mean

• 2

• Range

Measures of Central Tendency help us to relate numbers in a set of data to each other. For example, if the average student’s grade in your math class is an 81, we know that someone who has a grade of 97 is performing well ABOVE the average in that class.

Amongst the following choices, which grade would represent a student performance that is considered well BELOW average?

• 80

• 75

• 77

• 62