Data collection + categorical data

• Wiskunde
• Middelbare school
• vwo
• Leerjaar 2

Data collection and categorical data

Schedule: 

• Learning goals 
• Vocabulary 
• Categorical data 
• Work with your own data! 

Learning goals 

At the end of this lesson I can:

•  Use the correct vocabulary describing data 
• Draw a tally and frequency table for a data set 
• Find the mode for a data set

Statistics

Vocabulary 

Statistics: the study of collecting, organizing and analyzing data

Examples

Vocabulary 

Statistics: the study of collecting, organizing and analyzing data

Population: The entire set of items which you collect data from

Examples

Vocabulary 

Statistics: the study of collecting, organizing and analyzing data

Population: The entire set of items which you collect data from

Sample: A part of a population used to collect data 

Examples

Vocabulary 

Statistics: the study of collecting, organizing and analyzing data

Population: The entire set of items which you collect data from

Sample: A part of a population used to collect data 

Census: Collecting data from every item in the population

Examples

Debatable

Which would give you more accurate statistics of a population? 

A Sample or a Census? 

Debatable

Which would give you more accurate statistics of a population? 

A Sample or a Census? 

Why would you use a sample? 

Categorical data

Categorical data = Data which can be placed in categories 

in the survey I asked: 

- your gender 

- Your height

- Your travel time

- Your favorite subject

- The continent you lived in before the Netherlands

Categorical data

Categorical data = Data which can be placed in categories.

in the survey I asked: 

- your gender 

- Your height

- Your travel time

- Your favorite subject

- The continent you lived in before the Netherlands

Categorical data

You can organize categorical data with a tally and frequency table: 

Gender	Tally	Frequency
Male
Female

Categorical data

You can organize categorical data with a tally and frequency table: 

Gender	Tally	Frequency
Male
Female

Mode = the most frequent occuring category

Your own data

1. Go to ManageBac > Files > Unit 6 probability and statistics > MP2 data collection

2. Choose one of the following topics: Favorite subject, continent you lived in before the Netherlands, Languages spoken

3. Draw a tally and frequency table for the data 

4. Find the mode

5. Done? Repeat steps 2-4 for the other topics 

(extra) 6. Go to p. 352 of your book. Create a graph for your data: dot plot, Vertical column graph or horizontal bar chart

Work

P. 353-354: 18C                     1, 2, 3, 4

Next week...

We will spend 2 of the 4 lessons next week watching a movie. 

I will bring popcorn, 

What will you bring?