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Zigmanuir [339]
3 years ago
14

ms.conner's class is collecting quarters to buy a present for a homeless shelter .last week they collected $15.50 . How many qua

rters did they collect in total​
Mathematics
2 answers:
Alenkinab [10]3 years ago
8 0

Answer:

62 quarters

Step-by-step explanation:

1550/25=62

tiny-mole [99]3 years ago
7 0

Answer:

62 Quarters

Step-by-step explanation:

You would take the total amount given ($15.50) and the amount of a quarter ($0.25) and miltiply both numbers by 100 to make them whole numbers. After doing this, you will be left with 1550 and 25. You will now need to do 1550/25 which will get you 62. :)

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3 years ago
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3 years ago
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Rom4ik [11]

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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.

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3 years ago
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