What does the following mean (in words) and what are two ways to obtain a higher-powered test? The true mean is 3.3, the standard deviation is 1, and the sample size is 144, and the power is 88% for a hypothesis test at the 0.01 significance level.

Suppose that the Yellow Party wants to know how important national security is as a concern to voters. They intend to design a survey that will ask respondents to rate national security on a scale from 1 (Not at All Important) to 5 (Extremely Important). They're interested whether the true mean is above 3