A health researcher was interested in the variation of patient recovery rates across four different treatment programmes. He was particularly interested in whether the treatment programme that the patient was in had a possible influence on the patient’s recovery rate. He ran an ANOVA with the predictor variable ‘treatment programme’, which had three categories, ‘Placebo’, ‘Drug X’ and ‘Natural’; the outcome variable was ‘Patient recovery rate’.
His ANOVA had an F-statistic of 98.12 (p 0.02). How would you interpret his findings?
A. There is no significant difference in patient recovery rates by treatment programme.
B. There is insufficient information; the results of Post hoc tests are needed.
C. There is a significant difference in patient recovery rates by treatment programme.
D. The results are ambiguous.
Answer: C
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