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Virty [35]
3 years ago
12

25 points - Can anyone solve this pls?? ty so much

Mathematics
1 answer:
Citrus2011 [14]3 years ago
7 0

Surface area of larger box is 69% more so as a scale factor that is 1.69

Square root 1.69 = 1.3

Height of smaller box x 1.3 is height of larger box.

18 x 1.3 = 23.4 cm

Height = 23.4 cm

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While conducting a test of modems being manufactured, it is found that 10 modems were faulty out of a random sample of 367 modem
Kitty [74]

Answer:

We conclude that this is an unusually high number of faulty modems.

Step-by-step explanation:

We are given that while conducting a test of modems being manufactured, it is found that 10 modems were faulty out of a random sample of 367 modems.

The probability of obtaining this many bad modems (or more), under the assumptions of typical manufacturing flaws would be 0.013.

Let p = <em><u>population proportion</u></em>.

So, Null Hypothesis, H_0 : p = 0.013      {means that this is an unusually 0.013 proportion of faulty modems}

Alternate Hypothesis, H_A : p > 0.013      {means that this is an unusually high number of faulty modems}

The test statistics that would be used here <u>One-sample z-test</u> for proportions;

                             T.S. =  \frac{\hat p-p}{\sqrt{\frac{p(1-p)}{n} } }  ~  N(0,1)

where, \hat p = sample proportion faulty modems= \frac{10}{367} = 0.027

           n = sample of modems = 367

So, <u><em>the test statistics</em></u>  =  \frac{0.027-0.013}{\sqrt{\frac{0.013(1-0.013)}{367} } }

                                     =  2.367

The value of z-test statistics is 2.367.

Since, we are not given with the level of significance so we assume it to be 5%. <u>Now at 5% level of significance, the z table gives a critical value of 1.645 for the right-tailed test.</u>

Since our test statistics is more than the critical value of z as 2.367 > 1.645, so we have sufficient evidence to reject our null hypothesis as it will fall in the rejection region due to which <u><em>we reject our null hypothesis</em></u>.

Therefore, we conclude that this is an unusually high number of faulty modems.

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3 years ago
Harold works at a men's clothing store which marks up its retail clothing by 27%
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Wheres the question?
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3 years ago
A salesman is paid $450 a week, plus a commission of 35 cents for every item that he sells. Write a linear function where the pa
Ratling [72]

Answer:

Step-by-step explanation:

1400×0.35

490+450

940

3 0
2 years ago
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iren [92.7K]

Answer:

6

Step-by-step explanation:

7 0
2 years ago
Hi everyone... I am giving points... I repeat points
Snezhnost [94]

Answer:

why are you people giving them away???????

and btw how was your day?

and thanks fro the points

Step-by-step explanation:

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2 years ago
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