1. Which of the following statements are true concerning the mean of the differences between two dependent samples (matched pairs)? Select all that apply. A. The requirement of a simple random sample is satisfied if we have independent pairs of convenience sampling data. [B. If one wants to use a confidence interval to test the claim that Ho > 0 with a 0.01 significance level, the confidence interval should have a confidence level of 98%. C. The methods used to evaluate the mean of the differences between two dependent variables apply if one has 41 IQ scores of workers from New York and 41 IQ scores of workers from Texas. D. If one has more than 9 matched pairs of sample data, one can consider the sample to be large and there is no need to check for normality. E. If one has ten matched pairs of sample data, there is a loose requirement that the ten differences appear to be from a normally distributed population