Question 8 & 9 Please make sure answer is 100% correct, will upvote correct answer but downvote incorrect. Please read the rounding instructions carefully.

O There is not sufficient sample evidence to support the claim that the percentage of smokers is less than 31% Question 8 8 pts 9 1 0 Details In a survey, 11 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $48 and standard deviation of $13. Construct a confidence interval at a 98% confidence level. Give your answers to one decimal place. Interpret your confidence interval in the context of this problem. Question 9 4 pts 9 1 0 Details Which of the following options will cause a decrease in the margin of error for a confidence interval? O Decrease the confidence level O Decrease the sample size O Increase the confidence Decrease the sample size and increase the confidence