Power
Power is the probability of detecting a difference between treatment groups and is defined as 1-β, where β is the probability of committing a Type II error (concluding that no difference ___ ___ ____ _______ _______ ________ _______ ______ ____ _________ ______ ________.
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Inductive analysis
Proximity error
A child psychologist believes that children perform better on tests when they are given perceived freedom of choice. To test this belief, the psychologist carried out an experiment in which 200 third graders were randomly assigned to two groups; A and B. Each child was given the freedom to choose a text booklet from many with various drawings on the covers. The performance of each child was rated as very good, good and fair. The results are summarized in table provided. Test using chi-square whether there is sufficient evidence in the data to support the psychologist’s belief:
Placebo
Following are weight measurements of 7 boys and 10 girls aged 1-5 years:
| Boys: | 13, | 14, | 11, | 12, | 15, | 13, | 13 | |||
| Girls: | 10, | 16, | 12, | 13, | 18, | 13, | 19, | 14, | 13, | 12 |
Following data gives the relationship of lung cancer and exposure to cigarette smoke in obese and non-obese patients. Consider the data and solve the following:
i) Define Relative Risk (RR) and Odds Ratio (OR).
ii) Calculate the relative risk of diseased patients with respect to exposure of cigarette smoke in non obese and obese patients individually.
iii) Calculate the odds of “Not diseased” patients with respect to exposure of cigarette smoke in obese and non-obese patients individually.
Define research. Elaborate on research design.