QUIZ Question 14 of 15 This quiz: 34 pointis possible This question: 1 pointis possible Submit quiz The 2017 Chapman University Survey of American Fears asked a random sample of 1207 American advita if they buloved that alone had come to Earth In modem ine. and 2404 responded you Complete parts (a] through (d) below a. What is the standard snor for this estimate of the percentage of all Americans who believe that mione have come to Earth in modem tries? (Found to four decimal places as needed ) b. Find a 90% confidence merval for the proportion of all American who believe that alone have come to Earth in modem finan What is the margin of anet for the 90% confidence verval? IN 76 (Round to two decimal places as needed ) of. Suppose that a similar pot conducted in 2018 found that 24 7% of Americans believed allons have come in Faith in modem times. Based on your confidence imerial call you conclude that the proportion of Americans who believe that has increased ance 20187. C A The Portal does not support Bis claim. This is because 24 7%% is in the interval. C) B. The Interval Supports this claim. This is because 24,7% is not in the interval and al values are above 24.7% 3) C. The norad supports this claim, This is because 24 7% is in the injunal O D. The interval does not support this claim, This is because 247% is not in the interval, and all values are above 24,IN Time Remaining: 00:39 17 Next