Central Tendency with Line Plot

The arithmetic average of a set of numbers found by dividing the sum of all values by the number of values. It is a measure of central tendency.

The middle of an ordered list of values. If the list has an odd number of values, it is the middle value of that list. If the list has an even number of values, it is the mean of the two middle values. It is a measure of central tendency.

The value found most often in a set of numbers. There may be no mode, one mode, or more than one mode in a set of numbers. It is a measure of central tendency.

The “average” or “fair share” value for the data. The mean is also the balance point of the corresponding data distribution. 𝑎𝑟𝑖𝑡ℎ𝑚𝑒𝑡𝑖𝑐 𝑚𝑒𝑎𝑛 = 𝑥̅= 𝑥1 + 𝑥2 + 𝑥3 +∙∙∙ 𝑥𝑛 𝑛

• Mean-

• Median

• Mode

• Range

How many students received a score in the 80's?

• 2

• 10

• 14

• 27

What is the median of this dot plot?

• 5

• 33

• 32.5

• 35

Match the answers to the appropriate label.

• 65

• Lower Extreme

• 72

• Upper Extreme

• 58

• Lower Quartile

• 35

• Median

• 39

• Upper Quartile

a summary measure that attempts to describe a whole set of data with a single value that represents the middle or centre of its distribution.

• Median

• Mean

• Mode

• Central Tendency

The value for which half the numbers are larger and half are smaller. If there are two middle numbers, the median is the arithmetic mean of the two middle numbers. Note: The median is a good choice to represent the center of a distribution when the distribution is skewed or outliers are present.

• Median-

• Mode

• Box Plot

• Mean

The number that occurs the most often in a list. There can be more than one mode, or no mode.

• Range

• Median

• Mode

• Mean