1. The mean Exam score is 84.28 with a standard deviation of 6.71. You score 8 92 on the exam. What is your z-score? 2. The mean Exam score is 84.28 with a standard deviation of 6.71. You score a 92 on the exam. What percentage of students scored higher than you on the exam? 3. The mean Exam score is 84.28 with a standard deviation of 6.71 -Your friend scored an 86 on the exam. What is your friend's z-score? 4. The mean Exam score is 84.28 with a standard deviation of 6.71. Your friend scored an 86 on the exam. What percentage of students scored lower than your friend on the exam? 5. An environmental researcher takes a random sample of 225 city blocks and finds that 26% of them have an environmental hazard. Construct the 95% confidence interval for the proportion of all city blocks that have an environmental hazard. What is N in this sample? -What is the sample proportion (P)? -What is the standard error of the proportion (SP)? -The 95% confidence interval for the proportion of all city blocks that have an environmental hazard is to What is the confidence interval in percentage form 6. A car salesperson offers you a car at the price of $17,995, You look up the mean sales price for that car and find out that the mean is $18,500 with a standard deviation of $450. -What % of people bought the same car for less money than the salesperson is offering you