After hearing about Lance Armstrong and his use of performance -enhancing drugs , William wants to get an idea of how many Olympic athletes would use performance- enhancing drugs if they were allowed . William surveys 50 athletes to find out . Of the 50 athletes , 35 say they would use performance -enhancing drugs if it were allowed . 1 . What is the 99% confidence interval for the population proportion of athletes that would use performance -enhancing drugs ?" 2 . 0. 57 , 0. 83 6. 0. 59, 0. 81 C . 0 . 53, 0. 87 d. 0. 64, 0. 76 2 . Based on the proportion confidence interval , which of the following is likely to be true ?` a . All athletes would use performance -enhancing drugs if it were allowed . b . Over 50% of athletes are currently using performance enhancing drugs . C . The majority of athletes would use performance-enhancing drugs if it were allowed .* d . Very few athletes are interest in using performance -enhancing drugs . 3 . If the average woman's BMI is 26. 5 with a variance of 1 1 . 56 , what is the 95 %/ confidence interval you would expect sample means to fall within if n = 9 ? a. [ 18. 9 , 34 . 1 1 b . 124.3 , 28.71 C . 125.8 , 27 . 21 d . 122.6 , 30.41 Shannon is interested in attendance to Olympic events , so she takes a sample of 25 events and counts the number of people at each event . She finds an average of 50.00 people attend each event with a standard deviation of 490 . Assume a normal distribution . 4 . What is the estimated standard error of the attendance mean ? 1. 71 .43 6 . 1000 C . 6.93 d . 98 5 . What is the 95% confidence interval for the population mean of event attendance ?* a . b . 4797. 73, 5202. 27 4039. 60 , 5960 . 40 C . 4806. 35 , 5193. 65