QUESTION 6 1 point Exercise 3.14 Is it correct to say that, based on this USA Today online poll, we are 95% confident that 68.61% +0.4% of American adults are opposed to having the United States pass a constitutional amendment banning gay marriage? Explain your answer. Select the correct answer(s) This is a biased sample since it was a voluntary sample, so the confidence interval given is not valid. The confidence interval given is valid. We can form confidence intervals using statistics from SRS only. O Larger sample sizes are always better. QUESTION 7 1 points Exercise 3.16 Give the margin of error, as a percent, for a sample of size 25. Give the margin of error, as a percent, for a sample of size 100