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3 years ago

Determine the ratio of 100 pounds to 40 pounds

1 answer:

5 0

Hey there,
100 : 40
10 : 4 (divide by 10)
5 : 2 (divide by 2)
On side note : Do not place units while doing ration questions.

Hope this helps :))

<em>~Top</em>

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The pvalue of the test is 0.0124 < 0.1, which means that there is sufficient evidence at the 0.1 level to support the testing firm's claim.

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An automobile manufacturer has given its van a 59.5 miles/gallon (MPG) rating. An independent testing firm has been contracted to test the actual MPG for this van since it is believed that the van has an incorrect manufacturer's MPG rating:

At the null hypothesis, we test if the mean is the same, that is:

$H_0: \mu = 59.5$

At the alternate hypothesis, we test that it is different, that is:

$H_a: \mu \neq 59.5$

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$z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

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This means that $\mu = 59.5$

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This means that $n = 250, X = 59.2, \sigma = 1.9$

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$z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

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$z = -2.5$

Pvalue of the test and decision:

The pvalue of the test is the probability of finding a mean that differs from 59.5 by at least 0.3, which is P(|Z|>-2.5), which is 2 multiplied by the pvalue of Z = -2.5.

Looking at the z-table, Z = -2.5 has a pvalue of 0.0062

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