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Verdich [7]
2 years ago
7

Select the correct answer.

Mathematics
1 answer:
Irina18 [472]2 years ago
4 0
D. About 122 units I just took the test
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In a theatre room, there are 4 rows of  chairs. There are 4 columns of chairs. How many chairs are there in the theatre room?

4x4=16 

There are 16 chairs in the theatre room.
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Which values for x, y, and z satisfy the equation 7xy/z=28
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try x= 4z/y

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Add the following 2 wholes and 3/8 plus 3 wholes and 3/7
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325/56

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I need help with this question, please.
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Step-by-step explanation:

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3 years ago
A manufacturer of potato chips would like to know whether its bag filling machine works correctly at the 434 gram setting. It is
yan [13]

Answer:

No, there is not sufficient evidence to support the claim that the bags are underfilled

Step-by-step explanation:

A manufacturer of potato chips would like to know whether its bag filling machine works correctly at the 434 gram setting.

This means that the null hypothesis is:

H_{0}: \mu = 434

It is believed that the machine is underfilling the bags.

This means that the alternate hypothesis is:

H_{a}: \mu < 434

The test statistic is:

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.

434 is tested at the null hypothesis:

This means that \mu = 434

A 9 bag sample had a mean of 431 grams with a variance of 144.

This means that X = 431, n = 9, \sigma = \sqrt{144} = 12

Value of the test-statistic:

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

z = \frac{431 - 434}{\frac{12}{\sqrt{9}}}

z = -0.75

P-value of the test:

The pvalue of the test is the pvalue of z = -0.75, which is 0.2266

0.2266 > 0.01, which means that there is not sufficient evidence to support the claim that the bags are underfilled.

7 0
2 years ago
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