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KonstantinChe [14]
3 years ago
5

Sound intensity of certain Vacuum Cleaner is a random variable having a normal distribution with a mean of 75 dB and a standard

deviation (population) of 3 db. Using p-value approach, test the null hypothesis µ = 75 against the alternative hypothesis µ ≠ 75.
Mathematics
1 answer:
fomenos3 years ago
8 0

Answer:

10 thousand times loud pls mark me as the brainliset hope it helps you

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Step-by-step explanation:

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Answer:

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IrinaVladis [17]

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Likurg_2 [28]

Answer: x=- 8 or x=2


Step-by-step explanation:

1. To solve this problem you can applly the quadratic formula, which is shown below:

x=\frac{-b+/-\sqrt{b^{2}-4ac}}{2a}

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x^{2}+6x-6-10=0\\x^{2}+6x-16=0

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4. Therefore, when you substitute these values into the quadratic formula, you obtain the following result:

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