QUESTION 7 What does the 'alpha' symbol, in condence intervals, represent? 0 a. the chance of being correct 0 b. the chance of error 0 c. the margin of error 0 d.the standard error QUESTION 8 If a smaller margin of error is required, what should be changed? 0 a. decrease the sample size 0 b. decrease the population size 0 c. increase the sample size 0 d. increase the condence interval QUESTION 9 If the required margin of error is 225, and the standard deviation is 1200, what would be the appropriate sample size if the condence interval is 95% QUESTION 10 If the required margin of error is limited to 1.5%, what would be the appropriate sample size if the confidence interval is 98%