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3 years ago

13

When Shane got his water bill in January, he was shocked! He had used 143.43 gallons of water. About how much did he use each da

y?

1 answer:

Alinara [238K]3 years ago

6 0

There are 31 days in january, divide 143.43 by 31 to get your answer
answer is 4.63 gallons (i rounded)

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2 years ago

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A square has one of its sides increased by 7 inches and the other side decreased by 4 inches. Which of the following represents

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Answer:

Step-by-step explanation:

both the length and the width of a square is the same measurement.

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so one side is x + 7

and the other side decreased -4

so the other side is x - 4

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a vat of milk has spilled on a tile floor. the milk flow can be expressed with the function r(t) = 4t, where t represents time i

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B. sub 4 for t
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A fan is marked up 40% on the original price. The original price was $20. What is the new price of the fan before sales tax?

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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

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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.

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3 years ago