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Harlamova29_29 [7]
2 years ago
9

Math For test HELPPPP plz due in 45 mins

Mathematics
1 answer:
Klio2033 [76]2 years ago
3 0
It’s BD because it need to be the opposite ray and this one is the opposite ray so yes this is it
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2. To estimate the mean age for a population of 4000 employees, a simple random sample of 40 employees is selected. a. Would you
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Step-by-step explanation:

a.

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Size of the sample, n = 40

n/N = 40/4000 = 0.01

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b.

Population standard deviation is σ = 8.2

<u>So, the standard error of x’ using the finite population correction factor is give by</u>

σ(x’) = √[(N - n)/(N - 1)] x (sigma/√n)

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c.

Let the population mean be μ

Probability that the sample mean will be within =-2 of the population mean is

P(μ– 2 < x’ < μ + 2)

At x’ = μ – 2 , we have

z = (μ – 2 – μ)/1.2965

z = -1.54

at x’ = μ  + 2, we have

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<u>So the required probability is </u>

P(μ – 2 < x’ < μ + 2) = p(-1.54< z < 1.54)

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P(μ – 2 < x’ < μ + 2) = 0.8764

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3 years ago
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