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goku4420
04.11.2020 •
Mathematics
The incubation time for Rhode Island Red chicks is normally distributed with mean of 30 days and standard deviation of approximately 2 days. If 1000 eggs are being incubated, how many chicks do we expect will hatch in 24 to 26 days
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Ответ:
21.4
Step-by-step explanation:
Given that :
Mean number of days (m) = 30
Standard deviation (σ) = 2
Sample size (n) = 1000
First find the Zscore
Using the relation :
Zscore = (x - m) / σ
For x = 24
Zscore = (24 - 30) / 2
Zscore = - 6/ 2
Zscore = - 3
For x = 26
Zscore = (26 - 30) / 2
Zscore = - 4/ 2
Zscore = - 2
P(-3 < z < - 2)
P(z < - 3) = 0.0013499
P(Z < - 2) = 0.02275
0.02275 - 0.0013499 = 0.0214001
Hence,
n * 0.0214001
1000 * 0.0214001 = 21.4001
= 21.4
Ответ:
1.
So the independent variable is always at the x-axis, and in this case it's time.
The dependent variable is always on the y-axis, and in this case it's temperature.
2.
So ordered pair is (x,y), and in this case it's (8, 87). In context, at 8 AM the temperature was 87 F°.