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Irina18 [472]
2 years ago
11

I NEED HELP ASAP PLEASE AND THANK YOU.

Mathematics
1 answer:
alex41 [277]2 years ago
7 0

Answer:

b=30

Step-by-step explanation:

it hits the y axis at 30.

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A simple random sample of size n=14 is obtained from a population with μ=64 and σ=19.
madam [21]

Answer:

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Step-by-step explanation:

a) The population is normally distributed having a mean (\mu_x) = 64  and a standard deviation (\sigma_x) = \frac{19}{\sqrt{14} }

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Therefore: z=\frac{68.2-64}{\frac{19}{\sqrt{14} } }=0.83

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P(X < 68.2) = 0.7967

c) P(X  ≥  65.6)

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z=\frac{x-\mu_x}{\sigma_x}

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P(X  ≥  65.6) = 0.3745

P(X < 68.2) = 0.7967

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Step-by-step explanation:

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7 0
3 years ago
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