Effects on Measure of Center

2-1 Measures of Center

Introduced in L53

Warm Up

What is the most common height?

What is the least common height?

Learning & Habit Objectives

Learning: I will use measures of center to interpret data

Habit: I will take beautiful notes

Success Criteria

• I know how to find mean, median, mode and range

• I can find measures of center from lists and graphs

Notebook: Measures of Center

Mean = sum divided by number of numbers

Median = middle of an ordered set

Mode = most frequently occurring value or values

Range = subtract highest - lowest (to get a single value)

Notebook: Jose's test scores were 90, 90, 85, 92 and 80

1) Find the mean

2) Find the median

3) Find the mode

4) Find the range

Multiple Choice

The mean of 90, 90, 85, 92 and 80 is ____

• 90

• 10

• 84.7

• 87.4

Multiple Choice

The median of 90, 90, 85, 92 and 80 is ____

• 10

• 87.4

• 90

• 92

Multiple Choice

The mode of 90, 90, 85, 92 and 80 is

• 90

• 10

• 85

• There is no mode

Multiple Choice

The range of 90, 90, 85, 92 and 80 is ____

• 12

• 80 to 92

Multiple Choice

The mode is

• 8 or 9 hours

• 5 hours

• 2 hours

• There is no mode

Multiple Choice

The range is ___

• 9 hours

• 10 hours

• 0 to 10 hours

• 5 hours