Comparing data and outliers

• Wiskunde
• Middelbare school
• vwo
• Leerjaar 6

Good morning!

Schedule: 

• Learning goals 
• Describing and comparing data
• working on assignment

Learning goals 

At the end of this lessons I can:

• Describe the shape of a set of data 
• Compare multiple sets of data 
• Reasearch data

What unit measurements can we use in statistics?

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

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 

Describing data

Multimodal

Unimodal

No modal value

Bimodal

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

Describing data 

How is the data centered? 

- Centered on lower values? 

- Centered on higher values? 

- Evenly distributed? 

- Symmetrical?

Comparing data

what can you say about the differances in grades between class 1 and 2

Take out your agenda 

Homework the next lesson:

                            Practice exercise: #1, 3, 4, 5, 6