Question 14 2 points A research methods student carries out

Question 14 (2 points)

A research methods student carries out a null hypothesis test. She performs all the statistical analyses correctly and makes the correct decision to reject the null hypothesis. Which of the following statements is also correct?

Question 14 options:

She conducted a study which lacks enough power to detect a statistically significant difference between levels of the independent variable.

She may have committed a Type I error.

She may have committed a Type II error.

She could not have committed a Type I or Type II error.

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Question 15 (2 points)

Dr. Ward compares anxiety scores for patients who took her new drug (which is very expensive to produce) and an old drug (which is much less expensive to produce). She determines that there is a statistically significant difference between the scores of patients who took the two different drugs and submits the results of her study to the FDA with the expectation that they will approve marketing of the new medication. What else needs to be considered?

Question 15 options:

The cost of producing the new drug may prevent these results from having practical significance.

Whether or not she was able to reject the null hypothesis in her research study.

The number of patients who participanted in the study may have prevented these results from demonstrating practical significance.

Practical significance can only be assessed after the medication is FDA approved.

Solution

Q14.

b)   
She may have committed a Type I error.

In statistical hypothesis testing, a type I error is the incorrect rejection of a true null hypothesis (a \"false positive\")

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