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kelsiee24
16.09.2019 •
Mathematics
Apool 44 feet by 9 feet by 8 feet find the volume
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Ответ:
44 * 9 * 8 = 3168
The volume of the pool is 3,168
Hope that helped! =)
Ответ:
Solution: We are given:
μ=69,σ=4,n=90
We have to find P( Mean ≥69.4216)
We need to find the z score first.
z=(xbar-μ)/(σ/sqrt(n))
=(69.4216-69)/(4/sqrt(90))
=1.00
Now we have to find P(z≥1.00)
Using the standard normal table, we have:
P(z≥1.00) =0.1587
Therefore the probability that a sample of 90 students will have a mean score of at least 69.4216 is 0.1587