31. 100 different labs across the world each run the exact same study, with n =

Question

31. 100 different labs across the world each run the exact same study, with n = 20 subjects. 50 of the labs find a significant result with p<.05, and the other 50 labs do not find significant results with p>.05. Which statement is most accurate?

(a) this is the outcome that would be expected if there was no true effect, according to the null-hypothesis

(b) this outcome is not very likely given the null-hypothesis, instead there appears to be a true, and somewhat unreliable effect

(c) the effect appears to be unreliable, and if the researchers all increased their n by another 20 subjects, more of the labs should show non-significant findings

(d) the effect appears to be quite reliable, so if the researchers all decreased their n by 10 subjects, then the outcomes across labs should be the same.

Explanation / Answer

Ans- C

the effect appears to be unreliable, and if the researchers all increased their n by another 20 subjects, more of the labs should show non-significant findings

The more the sample size better the statistical results

Larger sample sizes allow researchers to better determine the average values of their data, and avoid errors from testing a small number of possibly atypical samples

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