Increasing which of the following can improve the power of a study?Question 4Answera.The confidence level.b.The sample size.c.The significance level (alpha).d.The standard error of the mean.
Question
Increasing which of the following can improve the power of a study?Question 4Answera.The confidence level.b.The sample size.c.The significance level (alpha).d.The standard error of the mean.
Solution
Increasing the sample size (option b) can improve the power of a study.
Here's why:
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The power of a study refers to the probability that it will detect an effect when there is an effect to be detected.
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Larger sample sizes increase the likelihood of the study detecting an effect if one exists. This is because larger sample sizes reduce the impact of random chance and thus increase the precision of the estimates.
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Therefore, by increasing the sample size, you can improve the power of a study.
It's important to note that while increasing the confidence level (option a) and decreasing the significance level (option c) can also increase the power of a study, they also increase the risk of Type I errors (false positives). The standard error of the mean (option d) is not something you can directly control, but it decreases with larger sample sizes, which indirectly improves the power of a study.
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