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

a. The requirement of a simple random sample is satisfied if we have matched pairs of voluntary response data.

b. If we have more than 10 matched pairs of sample data, we can consider the sample to be large and there is no need to check for normality.

c. If we have five matched pairs of sample data, there is a loose requirement that the five differences appear to be from a normally distributed population.

d. The methods of this section apply if we have 50 heights of women from Texas and 50 heights of women from Utah.

e. If we want to use a confidence interval to test the claim that md 7 0 with a 0.05 significance level, the confidence interval should have a confidence level of 90%.