True Statements? For the methods of this section, which of the following statements are true?

a. When testing a claim using a simple random sample of ten matched pairs of heights, hypothesis tests using the P-value method, critical value method, and confidence interval method will all result in the same conclusion.

b. The methods of this section are robust against departures from normality, which means that the distribution of sample differences must be very close to a normal distribution.

c. If we want to use a confidence interval to test the claim that md 6 0 with a 0.01 significance level, the confidence interval should have a confidence level of 98%.

d. The methods of this section can be used with annual incomes of 50 randomly selected nurses in North Carolina and 50 randomly selected nurses in South Carolina.

e. If we have ten matched pairs of heights of nurses, the methods of this section require that we use a sample size of n = 20.