A researcher wants to be sure that her random assignment to groups has been working. She wants to be sure that socio-economic status and treatment group are independent. Ideally, given her particular sample, there would be an equal number of people in each category. Calculate the marginal totals and the expected frequencies for each cell.
Definitions:
Education
The process of receiving or giving systematic instruction, especially at a school or university.
Confidence
The degree to which one can be certain or believe in a finding, result, or proposition, often used in the context of statistical conclusions.
Random Sample
A sample drawn from a population where each member has an equal chance of being selected.
Least Squares Line
A regression line calculated by minimizing the sum of squares of the differences between observed and predicted values.
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