Measures of Central Tendency and Variability Vocabulary

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 median of the top 50% of the number values in the data set is known as the _________________.

• Upper Extreme

• Principal

• Upper Quartile

• Range

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

Harley surveyed his classmates about how many siblings they have and got the following data: 0, 1, 3, 5, 4, 2, 2, 9, 1, 2, 0, 1, 1, 1, 1, 3  Which  measure is best measure of center of the data?

• Mean

• Median

• Mode

• Range

Find the median of these numbers:
4, 2, 7, 4, 3

• 2

• 5

• 7

• 4

In the last 5 games, Kevin Durant scored 22, 22, 18, 12, and 21 points. What is Durant's Mean (Average) score per game?

•  19 points per game

• 95 points per game

• 18.6 points per game

• 22 points per game

What is the mode of the scores?

• 24

• 14

• 34

• 30

What is the mode in the following numbers? [3, 24, 3, 7, 30, 1, 3, 7, 3]

• 3 and 7 both are modes

• 1 and 7 both are modes

• 3 only

• 7 only

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