MCQs for biostats class #Srishti Ramamurthy

1. 1) Which of the following statements describing confidence intervals is correct?

• A) Large sample size, narrower confidence intervals

• B) More variation within sample, smaller confidence intervals

• C) Small sample size, small confidence interval

• D) All of the above

2) Which of the following is utilized for sample size calculation?

• A) Alpha error

• B) Loss to follow up

• C) Minimum important difference

• D) All of the above

3) Correctly match the guidelines with study type

• A) PRISMA – Systematic reviews

• B) STROBE – Diagnostic test accuracy

• C) CONSORT – Meta analysis

• D) STAARD – Case control studies

4) The line of null effect for confidence intervals and forest plot is as follows

• A) 0 = relative indices

• B) 1 = absolute indices

• C) 0 for both

• D) 1 = relative indices

5) Pragmatic trials differ from explanatory trials in that

• A) Selection criteria are more rigid

• B) Industry sponsored trials tend to be pragmatic

• C) Response adaptive randomization

• D) Arms of the study and follow up criteria are to be strictly adhered to