Section 7.1 problems #6 & 8 6. Basic Computation: Empirical Rule What percentage of the area under the normal curve lies (a) to the right of ? (b) between / - 20 and / + 20? (c) to the right of # + 30? 8. Distribution: Rhode Island Red Chicks The incubation time for Rhode Island Red chicks is normally distributed with a mean of 21 days and standard deviation of approximately 1 day (based on information from The Merck Veterinary Manual). Look at Figure 7-3 and answer the following questions. If 1000 eggs are being incubated, how many chicks do we expect will hatch (a) in 19 to 23 days? (b) in 20 to 22 days? (c) in 21 days or fewer? (d) in 18 to 24 days? (Assume all eggs eventually hatch.) Note: In this problem, let us agree to think of a single day or a succession of days as a continuous interval of time.Section 7.2 probiems #5. E. 3.10 5. Basic Computation: 2 Score and Raw Score A normal distribution has p. = 30 and a = 5. [a] Find the z score corresponding to z = 25. [b) Find the z score corresponding to a: = 42. [c] Find the raw score corresponding to z = 2. [d] Find the raw score corresponding to z = 1.3. 8. Critical Thinking Raul received a score of 8!} on a history test for which the class mean was 70 with standard deviation 10. He received a score of75 on a biology test for which the class mean was YD with standard deviation 2.5. On which test did he do better relative to the rest ofthe class? MA235 Week 10 Homework 10. z Scores: Fawns Fawns between 1 and 5 months old in Mesa Verde National Park have a body weight that is approximately normally distributed with mean / = 27.2 kilograms and standard deviation o = 4.3 kilograms (based on information from The Mule Deer of Mesa Verde National Park, by G. W. Mierau and J. L. Schmidt, Mesa Verde Museum Association). Let a be the weight of a fawn in kilograms. Convert each of the following a intervals to z intervals. (a) x