1. To be a pilot in the United States Air Force, a candidate must meet a battery of physical requirements. One requirement is the candidate must have a standing height between 65 and 77 inches, inclusive. A. Sketch a number line graph of acceptable weights for a candidate to qualify as a pilot. B. Express acceptable heights for pilots as an interval. C. Write an expression in form to represent the interval. D. What is the margin of error? 2. Mrs. Ticer is running for city council in Beckville. The local news station conducts a survey and reports Mrs. Ticer is predicted to receive 58% of the vote with a margin of error of 4%. A. Write an expression in form to represent the interval B. Express the likely percentage of votes Mrs. Ticer will receive as an interval. C. Sketch a number line graph of likely percentage of votes Mrs. Ticer will receive.

3. A typical Thyroid Stimulation Hormone (or TSH) level is between 0.5 and 5.0 m/U/I. TSH levels below 0.5 can indicate an overactive thyroid and a condition called hyperthyroidism. TSH levels above 5.0 can indicate an underactive thyroid and a condition called hypothyroidism. Both hyperthyroidism and hypothyroidism can cause medical challenges for patients and must be monitored, but the symptoms and treatments for the two conditions are different. Based on the TSH levels indicated, decide if the patient is normal, has Hyperthyroidism, or has Hypothyroidism. Write Normal, Hyperthyroidism, or Hypothyroidism in the blank, A. Bob's TSH level is 5.4 _____________________ B. Sue's TSH level is 0.3 _____________________ C. Joe's TSH level is 0.9 _____________________ D. Amy's TSH level is 3.8 _____________________ 4. A medical researcher stores lab materials in a freezer. To make sure materials are properly frozen and safe to use for their work, the freezer must stay with in 5 degrees of the ideal temperature of 18 degrees Fahrenheit. Several times a day a lab manager checks the freezer display to make sure the materials are being stored at a safe temperature. Decide if the following temperatures are safe for the researcher's work. Write Yes if the temperature is acceptable, and No if the temperature is not safe. A. 20 degrees Fahrenheit ____________________ B. 11 degrees Fahrenheit ____________________ C. 25 degrees Fahrenheit ____________________ 5. Researchers are studying the amount of sleep elderly Americans are getting. They conduct a random sample of 3,000 Americans over 70 years of age. The mean hours of sleep is 8.3 hours with a standard deviation of 1.2 hours. Researchers want to find the 98% confidence interval. A. What is the sample mean? ____________________ B. What is the sample size? ____________________ C. What is the sample standard deviation? _______________ D. What is the stated goal of this question? ____________________________________