Nayland College - Mathematics
1.11 Bivariate Home | Assessment Criteria | Ask a Question | Make a Plan | Collecting Data | Cleaning Data | Making Scatterplots | Describing Scatterplots | Outliers | Line of Best Fit | Population Inference | Conclusion | Revision
Making a Plan
Identify VARIABLES: From the available data set what variables will be useful to establish a relationship (eg census at school)
Data types: Discrete and Continuous
Census At School: Groups available | Variables available | How to select and download a data set
Define a Problem, Decide on variables to be used, Downloading data sets,
Basic review on how to use Excel
|Making a plan Class notes, Blank notes|
The two variables are graphed using a scatter plot.
The scatter plot is the basic tool
Is there a relationship between the variables?
One variable dependant on the other (explanatory) variable?
Which way around should the variables go?
This topic will be completed using an EXCEL spreadsheet of provided data.
“I wonder if there is a relationship between the number of texts sent and time talking on a cell phone for students in year 11 at Nayland College”
What data would be useful to help answer this problem?
Is there a web site to find this data or do we collect our own?
Web sites: Census at School, or the Gamma maths data sets from www.mathematics.co.nz
Collect your own? Design a suitable survey, with quantitative questions (NOT descriptive answers)