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8090 [49]
3 years ago
11

Are these fractions equivalent or nonequivalent?xy/4y x/4​

Mathematics
1 answer:
Nina [5.8K]3 years ago
8 0

Answer:

They are equivalent

Step-by-step explanation:

x/4 multiplied by y/y equals to xy/4y. Therefore, they are equivalent

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<h2><u>Answer with explanation</u>:</h2>

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As per given , we have

Null hypothesis : H_0 : \mu =5400

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Since H_a is right-tailed and population standard deviation is also known, so we perform right-tailed z-test.

Formula for Test statistic : z=\dfrac{\overlien{x}-\mu}{\dfrac{\sigma}{\sqrt{n}}}

where, n= sample size

\overline{x}= sample mean

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z=\dfrac{5483-5400}{\dfrac{500}{\sqrt{95}}}=1.61796786124\approx1.6180

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[We reject the null hypothesis when critical value is less than the test statistic value .]

Conclusion : We have enough evidence at 0.06 significance level to support the claim that the new filament yields a longer bulb life

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