# 6.1 categorizing and displaying data/measures of central tendencies

Good morning!
Schedule:
• Introduction
• Learning goals
• Representing sets of data
• Homework
• Practice
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Slide 1: Tekstslide
WiskundeMiddelbare schoolvwoLeerjaar 3

In deze les zitten 25 slides, met interactieve quizzen, tekstslides en 1 video.

## Onderdelen in deze les

Good morning!
Schedule:
• Introduction
• Learning goals
• Representing sets of data
• Homework
• Practice

#### Slide 1 -Tekstslide

Learning goals
At the end of this lessons I can:
• Sort data in qualitative or quantitative data
• Sort quantitative data in discreet or continuous data
• Draw and read a stem-and-leaf diagram
• Calculate the measures of central tendency of any data

Statistics

#### Slide 3 -Woordweb

Representing sets of data
Qualitive data: data describing a certain characteristic

Quantative data: data with a numerical value

Discrete data                                                   Continuous data

#### Slide 4 -Tekstslide

Representing sets of data
Qualitive data: data describing a certain characteristic
ex: color of each car passing by
Quantative data: data with a numerical value

Discrete data                                                   Continuous data

#### Slide 5 -Tekstslide

Write on one side of the whiteboard "qualitative" and on the other side "quantitative" .

Qualitative
Quantitative
Discrete
Continuous
1
2
3
4
5
6
7
8
9
10

Qualitative
Quantitative
Discrete
Continuous
1
x
x
2
x
x
3
x
-
-
4
x
x
5
x
x
6
x
x
7
x
x
8
x
x
9
x
x
10
x
-
-

#### Slide 8 -Tekstslide

Stem-and-leaf diagram

#### Slide 9 -Tekstslide

Stem-and-leaf diagram

#### Slide 10 -Tekstslide

Stem and leaf worksheet

#### Slide 11 -Tekstslide

Measures of central tendency
Mode: The value that occurs most often

Median: The middle value (when the data is put in order)

Mean: The average for the dataset

#### Slide 12 -Tekstslide

Measures of central tendency
Median: The middle value (when the data is put in order)

n = amount of values
When n = odd

2(n+1)
Median =           th value
n = 19

#### Slide 13 -Tekstslide

Measures of central tendency
Median: The middle value (when the data is put in order)

n = amount of values

When n = even

Median =           th value

Take average of the middle values
2(n+1)
n = 30

#### Slide 14 -Tekstslide

Mode =

Median =

Range =

Key: 6|4 represents a score of 64
90
74
86
84
58
44

#### Slide 15 -Sleepvraag

Homework for Tuesday 7-2-2023:

Practice 2 on p.308-309: #3,4
Practice 3 on p. 310-311: ALL

#### Slide 16 -Tekstslide

Green              I would like a challenge
Orange           I would like to have some more practice
Red                  I would like to have some more practice and some  more help

#### Slide 24 -Tekstslide

Measures of dispersion

Range: The difference between the largest and smallest value