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Anastasy [175]
2 years ago
10

Make up a situation where a quantity is changing.'[

Mathematics
1 answer:
prisoha [69]2 years ago
6 0

Answer:

there are two chickens and they lay 2 eggs a day wich hatch into new chickens therefore the quantity goes up everytime the eggs hatch

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3 0
2 years ago
Weights were recorded for all nurses at a particular hospital, the mean weight for an individual nurse was 135 lbs. with a stand
Aloiza [94]
Given:
population mean, μ =135
population standard deviation, σ = 15
sample size, n = 19

Assume a large population, say > 100,
we can reasonably assume a normal distribution, and a relatively small sample.
The use of the generally simpler formula is justified.

Estimate of sample mean
\bar{x}=\mu=135

Estimate of sample standard deviation
\s=\sqrt{\frac{\sigma^2}{n}}
=\sqrt{\frac{15^2}{19}}=3.44124  to 5 decimal places.

Thus, using the normal probability table,
P(125
=P(\frac{125-135}{3.44124}
=P(-2.90593
=P(Z
=P(Z

Therefore 
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P(125<X<130)=0.0731166-0.0018308
=0.0712858



3 0
2 years ago
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