will the following actions increase the power of the study? (circle YES or No ne
ID: 3227216 • Letter: W
Question
will the following actions increase the power of the study? (circle YES or No next to the line) yes/no 37. Increase sample size yes/no 38 Decrease alpha yes/no 39. Decrease variability yes/no 40. Increase the difference between the groups 41.What is the goal of statistical process control (control charts)?: a. Reduction of variability in the process b. Improve the process c. Detect changes in the process d. All of the above 42. What are typical control limits for control charts?: a. 1-sigma b. 2-sigma c. 3-sigma d. 6-sigma 43. What are typical warning limits for control charts?: a. 1-sigma b. 2-sigma c. 3-sigma d. 6-sigmaExplanation / Answer
Solving first 4 subparts
37 Increase sample size -Yes .Other things being equal, the greater the sample size, the greater the power of the test.
38 Decrease alpha - No . The higher the significance level, the higher the power of the test. If you decrease the significance level, you increase the region of acceptance, resulting in lower power
39 Decrease variability- Yes. Greater the standard deviation,lower is the power of the test
40 Increase the difference between groups - Yes. The greater the difference between the "true" value of a parameter and the value specified in the null hypothesis, the greater the power of the test. That is, the greater the effect size, the greater the power of the test.
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