Question

It is recommended that a study has 200 participants. Only 80 participants signed up. If the...

It is recommended that a study has 200 participants. Only 80 participants signed up. If the study does continue with the 80 participants what should the researchers worry about? Alpha error, power error, type I error or type II error.

Math   Statistics-And-Probability   
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Answer #1

Correct option:

Power Error

Explanation:

Power = 1 - ,

where is the Type II Error, the probability of failing to reject the null hypothesis when the null hypothesis is not true.

So, if the Sample Size = n becomes smaller from 200 participants to 80 participants, the Standard Error becomes large. Thus. sampling distribution becomes wider. Thus, becomes large. Thus, Power becomes small.

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