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Olegator [25]
3 years ago
8

What is the answer to 10ii

Mathematics
1 answer:
laiz [17]3 years ago
8 0
Are you supposed to assume that the function y is linear or that it is quadratic?

                                              576-400
If linear, find the slope:  m = ------------- = 176
                                                 6-5

Then the equation you want is y-400 = 176(x-5), or
                                                 y         = 176x - 880 + 400, or y = 176 - 480.
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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
Can anyone figure this out? I’ll give Brainly :)) thank you!
Dennis_Churaev [7]

Answer:

hey:)

12:15-8:15=4hr

17:30-13:00=4:30hr

4+4:30=8:30hr

$11/hr therefore:

8:30×11= 8.5×11=93.5

and now round it to the nearest hundredth:) I hope this was helpful

8 0
2 years ago
Identify the slope and y-intercept of the graph of the equation.
Ksivusya [100]

Answer:

B

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
Which angles are supplementary to eachother
Harman [31]

Answer:

14 and 15

Step-by-step explanation:

6 0
3 years ago
A tile floor costs $8.50 per square foot. How much tile can Brett buy for $93.50?
Vesnalui [34]
93.50/8.50 = 11
She can by 11 tiles.
3 0
3 years ago
Read 2 more answers
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