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Illusion [34]
3 years ago
7

At Michael's Craft Store, the paiat set that you

Mathematics
1 answer:
andrew11 [14]3 years ago
8 0

Answer:

(C) $9.36

Step-by-step explanation:

10 percent off of 26 would be 23.4, then 40 percent off of 23.4 would be 9.36

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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
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Someone start a convo in the comments or try and message me idk how
ivanzaharov [21]

Answer:

Brainly is a platform that is used to help students in need. There are many social networks that offer socializing with many people from every country in the world.

I suggest you install any of those apps, and try find someone to talk to.

On this platform, we offer knowledge and help when it comes to important tests, quizzes and other knowledge-related topics.

Hope I helped.

6 0
3 years ago
Look at the picture and answer it please
AysviL [449]
The first choice is substitution because G s being substituted by C
5 0
3 years ago
Find the measure of ∠2 and ∠11<br><br> ∠2=________<br><br> ∠11=________
Ber [7]

Answer:

Angle 2 is 40 degrees and angle 11 is 50 degrees

Step-by-step explanation:

7 0
3 years ago
The quotient of 2 and the sum of a number and 1.
snow_lady [41]

Answer:

2 / (x + 1).

Step-by-step explanation:

If the number is represented by x the expression is:

2 / (x + 1).

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