Unit Four: Data Relationships

Some Important Terms

• First-hand data

- Data you use collected by you• Second-hand data- Data you use collected by someone else• Survey- Collecting data by answering questions• Tally- “Ticks” on a table to show data collected

Canteen orders in the morning!!!

Ways of Collecting Data:Observations- Watching what happens and writing it down

• Questionnaires - Respond to questions on paper

• Interviews- Ask questions and write down answers - Phone, In-person etc.

• Experiments- Test and record your results- Chemistry Experiments

• Databases- A table containing previously collected data- Weather in Newfoundland in 2009

• Electronic Media - Using technology to get data (computers)

Questions To Ask:

• What method of gathering information do you think would be the easiest? Why???

• What method of data collection would you use to find out the average amount of milk a grade 6 drinks? Why???

Review: Types of Graphs

• Bar Graph

• Double-Bar Graphs

• Pictographs

• Venn Diagram

Bar Graph

Parts of a Bar Graph

• Title - What the graph is about• Axis - Sides of a graph displaying data• Labels of Axis - Tells what we are looking at on the axis • Categories - What was used to get the data• Scale - The numbers on the axis on a graph• Bars - How the data in a bar graph is displayed

Double-Bar Graph

Pictograph

Venn Diagram

What Questions Could You Ask About the Following Graphs?

Textbook Questions

• Chapter 4: Getting Started

- Cracking Data: Page 110

A,B,C,D,E,F

• Page 111 #s 1, 2, 3, 4