1. Lesson 2: Designing a Survey
Recap: what makes a “good” survey?
LG: I can design an effective survey to collect 2-variable data

2. Task
Design a survey to collect 2-variable data about grade 12 students
Sample will be our class
What percentage of the population is being surveyed?
What type of sample is this?
Is this a representative sample?

3. Things to Consider: Questions Survey Method Are questions appropriate?
Are questions clearly stated and have correct spelling/grammar?
Are questions biased?
Survey Method
Will an anonymous written survey vs. interview-style affect the reliability of your data?

4. Possible Topics
# of siblings
Average marks
Hours spent watching TV/ playing video games/using phone/ working/ exercising
Height/weight/arm-span/
Number of coffees/energy drinks per day
Number of kilometers you live from school
Others?
Remember you are collecting 2-variable data, so you must obtain 2 pieces of NUMERICAL information from each subject.
All information must be obtainable in the class, through questions and/or simple measurements

5. Presenting Data in Tables:
Write a title that describes the contents or relationship among the entries in the table
Title are written at the top and accompanied by a table number
Give all rows and column a heading that includes units in parentheses
Use a ruler if drawing by hand
Example: Table 1: Comparison of phone use and time spent on homework
Subject
Phone Use
(min/day)
Homework 1 10 70 2 14 60 3 32 20 4 25 35

6. Presenting Data in Graphs:
Include a descriptive title (at the top) and label both axes; include unit symbols in parentheses
Independent variable is on the x-axis and the dependent variable is on the y-axis
Make it BIG! Choose a scale that will allow you
to fill most of the graph paper
Use regular intervals on each axis
Height – Weight comparison in Grade 12 students

7. Task The task is also described on pates 218 – 221 of your textbook.
On Wednesday during Repeat period, each group will present a short power point presentation with their survey results (introduction, table, graph and conclusion)