[-70.27 Points] DETAILS BBUNDERSTAT 12 6. 1.008.MT. The incubation time for a breed of chicks is normally distributed with a mean of 25 days and standard deviation of approximately 2 days. Look at the figure below and answer the following questions. If 1000 eggs are eggs eventually hatch.) being incubated, how many chicks do we expect will hatch in the following time periods? (Note: In this problem, let us agree to think of a single day or a succession of days as a continuous interval of time. Assume all Area Under a Normal Curve 2.35% 13.5% 34% 34% 13.5% 2.35% 14 - 30 H - 20 pto p + 20 p + 30 68% 95% 99.7% a) in 21 to 29 days chicks (b) in 23 to 27 days chicks (c) in 25 days or fewer chicks d) in 19 to 31 days chicks Need Help? Read It Watch It Master It 10. [-/0.27 Points] DETAILS BBUNDERSTAT12 6.1.009. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER At Burnt Mesa Pueblo, archaeological studies have used the method of tree-ring dating in an effort to determine when prehistoric people lived in the pueblo. Wood from several excavations gave a mean of (year) 1257 with a standard deviation of 31 years. The distribution of dates was more or less mound-shaped and symmetric about the mean. Use the empirical rule to estimate the following. (a) a range of years centered about the mean in which about 68% of the data (tree-ring dates) will be found between and A.D. (b) a range of years centered about the mean in which about 95% of the data (tree-ring dates) will be found between and A.D (c) a range of years centered about the mean in which almost all the data (tree-ring dates) will be found between and A. D. Need Help? Read it Watch It MacBook Air 20 Fo F10