# 6.1 Comparing data and outliers pt.2

Good afternoon!
Schedule:
• Learning goals
• Problem solving
• Describing data
• Comparing data
1 / 18
Slide 1: Tekstslide
WiskundeMiddelbare schoolvwoLeerjaar 6

In deze les zitten 18 slides, met interactieve quizzen en tekstslides.

## Onderdelen in deze les

Good afternoon!
Schedule:
• Learning goals
• Problem solving
• Describing data
• Comparing data

#### Slide 1 -Tekstslide

Learning goals
At the end of this lessons I can:
• Describe the shape of a set of data
• Compare multiple sets of data
• Research data

#### Slide 2 -Tekstslide

Problem solving strategies

Problem solving

#### Slide 4 -Tekstslide

Problem solving
Problem solving strategies:
- Trial and Error
- Divide problem in smaller problems/steps
- Realize the problem (literally DO the problem)
- Organize your information differently (ex. Table)
- Use algebraic methods
- Change your perspective/view to gain new insights

#### Slide 5 -Tekstslide

What vocabulary could you use to describe a data set?

#### Slide 6 -Woordweb

What are the measures of dispersion?

#### Slide 7 -Woordweb

Measures of dispersion
Range: The difference between the highest and the lowest value if a data set

Interquartile range(IQR):
The difference between Q1 (quartile 1) and Q3 (quartile 3) of a data set
Data set:
Range =

Q1 =

Q3 =

IQR =

#### Slide 8 -Tekstslide

Measures of dispersion
Range: The difference between the highest and the lowest value if a data set

Interquartile range(IQR):
The difference between Q1 (quartile 1) and Q3 (quartile 3) of a data set
Data set:
Range =

Q1 =

Q3 =

IQR =
20-2 = 18
2(13+15)=14
2(5+6)=5.5
14-5.5 = 8.5

#### Slide 9 -Tekstslide

Measures of central tendency
Mean: The average of a data set
Mean = sum of all values/amount of values

Median: the middle value of a data set (when the data is in order)

Mode: The value in the data set that occurs most often
Data set:
1 2 3 3 4 4 5 5 5 6 7

Find the mean, median and mode

#### Slide 10 -Tekstslide

Measures of central tendency
Mean: The average of a data set
Mean = sum of all values/amount of values

Median: the middle value of a data set (when the data is in order)

Mode: The value in the data set that occurs most often

#### Slide 11 -Tekstslide

Describing data (Mode)
Multimodal
Unimodal
No modal value
Bimodal

#### Slide 12 -Sleepvraag

Describing data
No modal value:
there is no mode
Bimodal:
there are 2 modes
Multimodal:
there are more than 2 modes
Unimodal:
there is 1 mode

#### Slide 13 -Tekstslide

Describing data (shape)
How is the data centered?
- Centered on lower values?
- Centered on higher values?
- Evenly distributed?
- Symmetrical?

#### Slide 15 -Tekstslide

Comparing data

- "Both classes had no outliers. Nobody scored extremely high or low on the test"
- "The median marks for class 1 is slightly higher than the median for class 2"
- " The IQR from both classes are very close. The middle 50% of both classes have a similar spread"

#### Slide 16 -Tekstslide

Homework for Monday 11-10-2021:
Practice 6 on p. 318-320: #1, 3, 4, 5, 6