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Simora [160]
2 years ago
13

I dont understand graphs at all

Mathematics
2 answers:
Murrr4er [49]2 years ago
5 0

Answer:

cool?

Step-by-step explanation:

Elden [556K]2 years ago
5 0
Same same same same same
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A manufacturer of nails claims that only 4% of its nails are defective. A random sample of 20 nails is selected, and it is found
irakobra [83]

Answer:

The p-value of the test is 0.0853 > 0.05, which means that there is not enough evidence to reject the manufacturer's claim based on this observation.

Step-by-step explanation:

A manufacturer of nails claims that only 4% of its nails are defective.

At the null hypothesis, we test if the proportion is of 4%, that is:

H_0: p = 0.04

At the alternative hypothesis, we test if the proportion is more than 4%, that is:

H_a: p > 0.04

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.

4% is tested at the null hypothesis

This means that \mu = 0.04, \sigma = \sqrt{0.04*0.96}

A random sample of 20 nails is selected, and it is found that two of them, 10%, are defective.

This means that n = 20, X = 0.1

Value of the test statistic:

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

z = \frac{0.1 - 0.04}{\frac{\sqrt{0.04*0.96}}{\sqrt{20}}}

z = 1.37

P-value of the test and decision:

Considering an standard significance level of 0.05.

The p-value of the test is the probability of finding a sample proportion above 0.1, which is 1 subtracted by the p-value of z = 1.37.

Looking at the z-table, z = 1.37 has a p-value of 0.9147

1 - 0.9147 = 0.0853

The p-value of the test is 0.0853 > 0.05, which means that there is not enough evidence to reject the manufacturer's claim based on this observation.

7 0
2 years ago
Read 2 more answers
Use the compound interest formula to determine the final value of the given amount.
CaHeK987 [17]

Answer:

342.22$

Step-by-step explanation:

7 0
2 years ago
Which angles are supplementary and vertical?
Brrunno [24]

Answer: i would show the picture with it too because I don’t think i could answer that without knowing what the angle looks like

Step-by-step explanation:

3 0
2 years ago
Suppose your friend's parents invest $10,000 in an account paying 4% compounded annually. What will the balance be after 9 years
LiRa [457]

Answer:

$14233.12

Step-by-step explanation:

10,000(1+.04/1)^1(9)

5 0
3 years ago
Please help i'm desperate!!
Leya [2.2K]
I’m not sure maybe if there was an imagine I’d be able to answer this question.
6 0
2 years ago
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