In this study the researchers found that by Dr. Janet Forrester

Question 5 / 10: In this study, the researchers found that, on average, those on the all?-beet diet lost an

average of 4.5 pounds with a standard deviation of 4.0 pounds, compared to those on

the traditional diet, who lost an average of 4.6 pounds, with a standard deviation of 4.9

pounds. If the statistical test comparing weight lost between the two groups had a

statistically significant result, what would you conclude about the study?

A The study had inadequate power.

B The study had an inadequate sample size.

C The study has a type?-I error rate <0.05.

D The p?-value is <0.05.

E The results may be clinically significant, but not statistically significant.

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Epidemiology Hypothesis Testing & P-values

Author:

Dr.Janet ForresterProfessor

Tufts University School of Medicine

USA

Access: Public Instant Grading

Attribution: Janet, E.A. Forrester, Kwan Ho Kenneth Chui, Steven Cohen, Michael D. Kneeland, Alice Tang, David Tybor. Epidemiology and Biostatistics 2010. (Tufts University OpenCourseWare), http://ocw.tufts.edu/Course/65/ (Accessed 3 May, 2014). License: Creative Commons BY-NC-SA

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