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Marrrta [24]
3 years ago
5

What’s the answer for this Algebra Math question??

Mathematics
2 answers:
Gnoma [55]3 years ago
7 0

Answer:

The answer is C

Artyom0805 [142]3 years ago
7 0
Answer: The answer is C.
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Step-by-step explanation:

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3 years ago
The waking time of a student under common conditions is normally distributed with mean of 30 hours and a standard deviation of 5
Elina [12.6K]

Answer:

If the walking time is greater than or equal to 38.225 hours, than it exceeds 95% probability that is lie in top 5%.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 30 hours

Standard Deviation, σ = 5 hours

We are given that the distribution of waking time is a bell shaped distribution that is a normal distribution.

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z_{score} = \displaystyle\frac{x-\mu}{\sigma}

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P( X < x) = P( z < \displaystyle\frac{x - 30}{5})=0.95  

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Thus, if the walking time is greater than or equal to 38.225 hours, than it exceeds 95% probability that is lie in top 5%.

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