Survey Assignment-Analysis of Class Database Survey: Types of Data, Sampling and Assessing Bias
You will have access to any and all information and equipment necessary to do this sampling
(provided it can be found at the school). Funding for supplies and a staff of two volunteers will be provided for you.
Devise a sampling strategy that combines both systematic and stratified sampling techniques. Explain this strategy in detail. (2)
Devise a sampling strategy that is both random and systematic. Explain your strategy in
detail (2)
A colleague of yours tells you that they would not use any of the above strategies.
Instead they suggest the following:
Stratify the population as follows:
Grade Total # of classes Classes Sampled
9 11 5
10 14 5
11 8 5
12 6 5
PIP 2 1
Randomly choose the required number of classes by drawing their teacher’s
names ‘out of a hat’.
Sample the entire class.
Have the teachers sort the survey’s alphabetically.
Choose every other survey and those remaining surveys become your sample.
Explain two problems that exist with this strategy and then describe how you could use their framework to effectively perform a random, stratified, and systematic sample. (4)
