1. Designing a 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 at St. Benedict 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 – Are questions appropriate? – Are questions clearly stated? – Are questions biased? Survey Method – Will a 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 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 SubjectPhone Use (min/day) Homework (min/day) 11070 21460 33220 42535

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