Apply Measures of Central Apply Measures of Central Tendency and RangeTendency and Range

SWBAT find and use the range, SWBAT find and use the range, mean, median, and mode of a mean, median, and mode of a

data set data set

DefinitionsDefinitionsMean Mean The average of a set of numbers, calculated by The average of a set of numbers, calculated by

adding up a set numbers and dividing by amount of adding up a set numbers and dividing by amount of numbers in the set numbers in the set

Median Median The middle number of a set of data, when the set is in The middle number of a set of data, when the set is in

numerical order numerical order

Mode Mode The number that occurs most frequently in a set of The number that occurs most frequently in a set of

numbersnumbers

Range Range The difference between th greatest and least values The difference between th greatest and least values

in a data set in a data set

ExamplesExamples

Calculate the mean, median, mode and range.Calculate the mean, median, mode and range.

DayDay SunSun MonMon TueTue WedWed ThurThur FriFri SatSat

# of # of sit sit upsups

2828 3030 3030 3737 3535 4040 4545

ExamplesExamples

Calculate the mean, median, mode and range.Calculate the mean, median, mode and range.

Ana’s Reading Test ScoresAna’s Reading Test Scores

70 110 90 70 6070 110 90 70 60

ExamplesExamples

Calculate the mean, median, mode and range.Calculate the mean, median, mode and range.

Bob’s Daily ExpensesBob’s Daily Expenses

$4.50 $4.95 $4.80 $6.25 $4.25$4.50 $4.95 $4.80 $6.25 $4.25

ExamplesExamples

Find the mean, median, mode and range.Find the mean, median, mode and range.

Determine which one would be most Determine which one would be most useful for describing the datauseful for describing the data Isaiah scored 15, 7, 5, 3, 9, and 15 points in 6 Isaiah scored 15, 7, 5, 3, 9, and 15 points in 6

basketball games. He want to show that he is basketball games. He want to show that he is a valuable player.a valuable player.

Ethan spent 5 min, 2 h, 6 h, 1h, and 6 h using Ethan spent 5 min, 2 h, 6 h, 1h, and 6 h using the internet for the past 5 days. He wants to the internet for the past 5 days. He wants to consider how much he spend on the internet.consider how much he spend on the internet.