Quiz Module 4 - Class #2

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Question 1 of 3

1. Question

1. A randomized clinical trial (RCT) did not find statistical significance comparing the experimental restorative treatment A and the conventional technique. However, a systematic review of RCTs published three months later showed that this technique A is superior to the conventional restorative treatment. What is the probable error type that occurred?

a) Type I error
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b) Type II error
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c) Any error occurred. Probably the error happened in the systematic review
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Question 2 of 3

2. Question

2. Considering the table, choose the correct alternative:

a) Regular soda provokes a statistically significantly more severe erosive tooth wear.
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b) There were no significant differences among the groups, although regular soda presented higher erosive tooth wear.
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c) Light soda presented more severe erosive tooth wear.
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Question 3 of 3

3. Question

3. Which of the alternatives below is correct?

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a) α (alpha) is the probability for the occurrence of a type II error, and it is also known as significance level.
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b) The p-value is the tolerable limit of probability of the study rejecting the null hypothesis, given that the null hypothesis is true.
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c) The lack of statistical power can lead to type II error and can be related to the study sample size.
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Quiz Module 4 – Class #2

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