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Misha Larkins [42]
3 years ago
7

Your friend has a collection of CDs. 2/3 of the CDs have booklets, 1/2 of the CDs are singles, and one for our singles with book

lets. All but two of the CDs are either singles or have booklets or both. How many CDs does your friend have
Mathematics
1 answer:
rodikova [14]3 years ago
8 0
The CD has 8 friend in blankets or both
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Simplify 4x^2 / 3 X 6/ 8x
Leokris [45]

Answer:

x

Step-by-step explanation:

The answer to

\frac{4 {x}^{2} }{3}  \times  \frac{6}{8x}

= x

3 0
2 years ago
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A random sample of 40 binomial trials resulted in 14 successes. test the claim that the population proportion of successes does
mylen [45]

Using the z-distribution, since the p-value of the test is of 0.057 > 0.05, there is not enough evidence that the population proportion of successes does not equal 0.50.

<h3>What are the hypotheses tested?</h3>

At the null hypotheses, we test if the proportion of successes equals 0.5, hence:

H_0: p = 0.5

At the alternative hypotheses, we test if it does not equal, hence:

H_1: p \neq 0.5

<h3>What is the test statistic?</h3>

The test statistic is given by:

z = \frac{\overline{p} - p}{\sqrt{\frac{p(1-p)}{n}}}

In which:

  • \overline{p} is the sample proportion.
  • p is the proportion tested at the null hypothesis.
  • n is the sample size.

For this problem, the parameters are given by:

n = 40, \overline{p} = \frac{14}{40} = 0.35, p = 0.5

Hence the test statistic is given by:

z = \frac{\overline{p} - p}{\sqrt{\frac{p(1-p)}{n}}}

z = (0.35 - 0.5)/(0.5/sqrt(40))

z = -1.9.

<h3>What is the decision?</h3>

Using a z-distribution calculator, considering a two-tailed test, as we are testing if the proportion is different of a value, with z = -1.9, we get that the p-value of the test is of 0.057.

Since the p-value of the test is of 0.057 > 0.05, there is not enough evidence that the population proportion of successes does not equal 0.50.

More can be learned about the z-distribution at brainly.com/question/16313918

#SPJ4

5 0
1 year ago
Please help me?!<br> I need help!?
Olin [163]

Answer:

Area = 6.25\pi ft^2

Step-by-step explanation:

Area = \pi \\r^{2}

The diameter is 5 feet.  That makes the radius 2.5 feet

Area = \pi \\r^{2}

Area = \pi \\2.5^{2}

Area = 6.25\pi ft^2

6 0
2 years ago
SOMEONE PLS HELP<br> Find the volume.
Minchanka [31]

Answer: The answer is 600 cm.

Step-by-step explanation:

6 0
3 years ago
Exam Guidelines
pashok25 [27]

Answer:

Answer is B. Y=31

Step-by-step explanation:

4y + 228 = 352

(4)(y) = 352 -228

y = 124/4

y = 31

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2 years ago
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