In a study, researchers randomly assigned 500 people to the “treatment group” and the other 500 to the “control (or placebo) group”. A statistically significant difference was reported between the res...
In a study, researchers randomly assigned 500 people to the “treatment group” and the other 500 to the “control (or placebo) group”. A statistically significant difference was reported between the responses of the two groups with p-value < 0.005. What is the best conclusion?
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A. There is little evidence that the treatment has any effect.
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B. Here is strong evidence that the treatment is effective.
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C. Using a 5% significance level, we can conclude that the treatment was not effective, but there is a 5% chance this conclusion is wrong.
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D. There is a 99.5% chance that the null hypothesis is correct.
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E. There is only a 0.5% chance that the observed differences are real, and so only a 0.5% chance that the treatment was effective.
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F. The observed differences in means could be due to chance.
Homework Answers
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B. Here is strong evidence that the treatment is effective
Because, p level is < 0.005
We can say null is rjected
Hence, strong evidence that the treatment is effective
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You may have to zoom in on a few questions, but I posted the
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