# 7.U2.9-Measures of Center

Unit 2: Lesson 8
Measures of Central Tendency: Mean, Median, Mode
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Slide 1: Slide
Mathematics

This lesson contains 10 slides, with interactive quizzes and text slides.

## Items in this lesson

Unit 2: Lesson 8
Measures of Central Tendency: Mean, Median, Mode

#### Slide 1 -Slide

At noon, the temperature was 12 degrees. It rose 8 degrees during the afternoon and then dropped 28 degrees by midnight. What was the temperature at midnight?

#### Slide 2 -Open question

How do we describe a set of numbers?
Mathew's grades started out low, but he worked hard to raise them. His test scores are 23, 63, 68, 71, 95, 92, 95, 100, and 87.

How can he describe his grades to his parents?

#### Slide 3 -Slide

measures of central tendency
Measures of central tendency are ways to best represent the middle number of a set.
Mean (Average)

Medium

Mode

#### Slide 4 -Slide

What is the mean, medium and mode of Mathew's grades?
23, 63, 68, 71, 95, 92, 95, 100, and 87

#### Slide 5 -Slide

Find the mean for the numbers below
10 -1 -2 6 4
A
4.6
B
3.4
C
4
D
-3.4

#### Slide 6 -Quiz

Find the outliers for the number set
6 3 -2 -18 10
A
-18
B
10
C
-2
D
3

#### Slide 7 -Quiz

Complete the following questions as a check-out. Find the median of the set by following the steps:
1. Put the numbers in order from left to right on number line
-15 -2 -1 -14 17 -9

A
-1,-2,-9,-14,-15,17
B
17,-15,-14,-9,-2,-1
C
-15 -2 -1 -14 17 -9
D
-15,-14,-9,-2,-1,17

#### Slide 8 -Quiz

2. Find the 2 central numbers by crossing out the numbers on either side.
A
-1,-2
B
-14,-9
C
-9,-2
D
-1,-14

#### Slide 9 -Quiz

Find the average of the 2 middle number. This is the median.
A
-1.5
B
-11.5
C
-5.5
D
-7.5