10.13 pts] For the data in the box plot, which pair of measures would be resista
ID: 2946518 • Letter: 1
Question
10.13 pts] For the data in the box plot, which pair of measures would be resistant to the outiers. (A) Mean and standard deviation (B) Median and inter-quartile range (C) Mean and inter-quartile range (D) Median and standard deviation 11. [4 pts] Circle all of the following statements which are true about the sample size in a study (assuming the sample statistics remain the same). (A) Decreasing the sample size will decrease the power of the test. (B) Decreasing the sample size will increase the probability of a type I error. (C) Decreasing the sample size will increase the width of a confidence int (D)D the sample size will remove bias from a sample.Explanation / Answer
Answer 10:
Option B is correct.
Median and Inter-quartile range are resistant to outliers whereas mean and standard deviation are sensitive to outliers.
Answer 11:
Option A and C are correct.
Decrease in sample size increases the probability of type II error and hence decreases power. Large sample size will have less bias. Increasing the sample size decreases the width of confidence intervals, because it decreases the standard error.
Answer 12:
a. Relative Risk = 1- 0.19 = 0.81
b. Option A is correct.
Since zero does not lie within the interval (0.63, 1.07), there is significant association between breakfast habits and diabetes status.
Answer 13:
Option D is correct.
Since the confidence interval for true population mean is 19.7 to 32.3. We are 95% confident that the true mean hours of work per week for college students is between 19.7 and 32.3 hours.
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