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