The incubation time for a breed of chicks is normally distributed with a mean of 21 days and standard deviation of approximately 2 days. Look at the figure below and answer the following questions. If 1000 eggs are 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 eggs eventually hatch.) Area Under a Normal Curve 2.35% 13.5% 34% 34% 13.5%2.35% H- 30 u- 20 u+ 20 u + 30 68% 95% 99.7% (a) in 17 to 25 days 950 v chicks (b) in 19 to 23 days 500 x chicks (c) in 21 days or fewer x chicks 997 (d) in 15 to 27 days 680 x chicks

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The incubation time for a breed of chicks is normally distributed with a mean of 21 days and standard deviation of approximately 2 days. Look at the figure below and answer the following questions. If 1000 eggs are 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 eggs
eventually hatch.)
Area Under a Normal Curve
2.35%
13.5%
34%
34%
13.5%
2.35%
H - 30
u - 20
µ + 20
u + 30
68%
95%
99.7%
(a) in 17 to 25 days
950
chicks
(b) in 19 to 23 days
500
X chicks
(c) in 21 days or fewer
997
chicks
(d) in 15 to 27 days
680
chicks
Transcribed Image Text:The incubation time for a breed of chicks is normally distributed with a mean of 21 days and standard deviation of approximately 2 days. Look at the figure below and answer the following questions. If 1000 eggs are 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 eggs eventually hatch.) Area Under a Normal Curve 2.35% 13.5% 34% 34% 13.5% 2.35% H - 30 u - 20 µ + 20 u + 30 68% 95% 99.7% (a) in 17 to 25 days 950 chicks (b) in 19 to 23 days 500 X chicks (c) in 21 days or fewer 997 chicks (d) in 15 to 27 days 680 chicks
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