Question

This question comes from R studio statistical software.

For a comparison between two means, what information will the R code below provide?

> power.t.test(n=6, delta=NULL, sd=2.2, sig.level=0.05, power=0.8)

Group of answer choices

A.) The number of replications needed to achieve the stated level of power

B.) The effect size (detectable difference) at the stated level of power

C.) The Type I error rate

Answer 1

ANSWER::

In power.t.test, we can pass only one argument as NULL from n, sd, power, sig.level and delta. The parameter which is NULL will be obtained from the given arguments.

Therefore delta, the true mean difference will be obatined that is the effect size at the stated level of power

Option (B) is correct:: The effect size (detectable difference) at the stated level of power

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