The american heart association is about to conduct an anti-smoking campaign and wants to know the fraction of americans over 41 who smoke. step 1 of 2: suppose a sample of 830 americans over 41 is drawn. of these people, 673 don't smoke. using the data, estimate the proportion of americans over 41 who smoke. enter your answer as a fraction or a decimal number rounded to three decimal places. step 2. suppose a sample of 830 americans over 41 is drawn. of these people, 673 don’t smoke. using the data, construct the 80% confidence interval for the population proportion of americans over 41 who smoke. lower bound: upper bound:

Carla was trying to decide what to do saturday evening. she has $100 available to spend for the evening. she has narrowed her choices down to these events: braves game, a concert of an artist she likes, or the georgia aquarium. admission to the braves game is $25, hot dogs cost $10, sodas cost $5. the concert costs $25 for admission, $20 for a souvernir t-shirt, and $10 for a soda. the georgia aquarium has the show of a lifetime with an all you can eat and drink that costs $100. carla does not want to take any driving chances, so in addition to the cost of the aquarium, she will also need to pay for her uber/lyft, which is $15 each way. which option should carla choose if she wants to spend the least? based on that choice, what then is carla's oppotunity cost? fully explain your answer in at least one paragraph.