I am conducting a statistical survey about hours of sleep vs. grades among the students in a school from 6th-12th grade. I will be sampling 4 students from each grade level. As of now my plan is to stand in a communal area and randomly select students to survey, however I am concerned about self-selection and bias. I am looking for suggestions about ways to account for any bias, or an entirely different method of sampling. I am open to all suggestions. Thanks!
How should I compensate for the medthod of selection?
First of all you need to broaden your sample size. You're using 7 grade levels with four students from each which means N=28. Not much to base your conclusions on...As for selecting if you yourself are choosing the subjects then you're correct. You have just introduced bias into your study. Give everyone a number and then have a teacher or someone else draw the number from a hat. Perhaps you could even search online for a Random Number Generator.....Good luck and great topic to study by the way.
Reply:i just emailed u my answer to this question - the answer is in picture format. lol
Reply:maybe have a couple other people also ask in different schools or different parts of the city or state?
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