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Nezavi [6.7K]
2 years ago
10

Just help me please?!?!?!

Mathematics
1 answer:
Tems11 [23]2 years ago
3 0

Answer:

the last one

Step-by-step explanation:

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The lifetimes of 10,000 watch batteries are normally distributed the mean lifetime is 500 days the standard deviation is 60 days
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Given:
μ = 500 days, the population mean
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Therefore
μ + σ = 560
μ - σ = 440
μ + 2σ = 620
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The figure shown below illustrates the normal distribution
About 68% of the total area lies in x = (μ-σ, μ+σ)
About 95% of the total area lies in x = (μ-2σ, μ+2σ)
About 99.7% of the total area lies in x = (μ-3σ, μ+3σ).

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Step-by-step explanation:

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3 years ago
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ollegr [7]

Step-by-step explanation:

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