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3 years ago

Someone please please help help me please please help help please please help me please please ASAP ASAP!!!!

Mathematics

1 answer:

zhannawk [14.2K]3 years ago

8 0

okay so what you want to do is lie by saying you did it.

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3 years ago

An airplane flies 2107 miles in 3 hours 35 minutes. What is its average speed in Files per hour?

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Find the coordinates of the image of the point (0,2) when it is reflected across the line x=3

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3 years ago

A company manufacturing computer chips finds that 8% of all chips manufactured are defective. In an effort to decrease the perce

neonofarm [45]

Answer:

The correct value of the Z-statistic is z = -1.56

Step-by-step explanation:

A company manufacturing computer chips finds that 8% of all chips manufactured are defective.

This means that the null hypothesis is:

$H_{0}: p = 0.08$

A hypothesis test is performed to determine if the additional training was effective in lowering the defect rate.

This means that the alternate hypothesis is:

$H_{a}: p < 0.08$

z-statistic:

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

In which X is the sample mean, $\mu$ is the value tested at the null hypothesis, $\sigma$ is the standard deviation and n is the size of the sample.

0.08 is tested at the null hypothesis:

This means that $\mu = 0.08, \sigma = \sqrt{0.08*0.92}$

After training was implemented, a sample of 450 chips revealed only 27 defects.

This means that $n = 450, X = \frac{27}{450} = 0.06$

The correct value of the Z-statistic is

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

$z = \frac{0.06 - 0.08}{\frac{\sqrt{0.08*0.92}}{\sqrt{450}}}$

$z = -1.56$

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3 years ago