1. The mean Exam score is 84.28 with a standard deviation of 6.71.

You score a 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____to___?

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?