Question 12 • CA-Statistics and Probability B
Power is the probability of rejecting the null value 0.97 when the true value is 0.98. Increasing α makes rejection easier, which increases power, and increasing the sample size n reduces sampling variability, making the difference between 0.97 and 0.98 easier to detect. Decreasing α or n would lower power; taking a separate random sample does not inherently increase it.
AI-written and checked against the verified answer.