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REY [17]
3 years ago
7

Keith bake 3 cherry pies and 2 apple pies.He wants to share each pie equally among 6 of his neighbors. How much of each type of

pie will each neighbor get
Mathematics
1 answer:
timofeeve [1]3 years ago
7 0
Each neighbor will get 1/2 of the cherry pie and 1/3 of the apple pie.
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The dwarves of the Grey Mountains wish to conduct a survey of their pick-axes in order to construct a 99% confidence interval ab
Dmitry_Shevchenko [17]

Answer:

The minimum sample size needed is 125.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

The margin of error is:

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

For this problem, we have that:

\pi = 0.25

99% confidence level

So \alpha = 0.01, z is the value of Z that has a pvalue of 1 - \frac{0.01}{2} = 0.995, so Z = 2.575.

What minimum sample size would be necessary in order ensure a margin of error of 10 percentage points (or less) if they use the prior estimate that 25 percent of the pick-axes are in need of repair?

This minimum sample size is n.

n is found when M = 0.1

So

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

0.1 = 2.575\sqrt{\frac{0.25*0.75}{n}}

0.1\sqrt{n} = 2.575{0.25*0.75}

\sqrt{n} = \frac{2.575{0.25*0.75}}{0.1}

(\sqrt{n})^{2} = (\frac{2.575{0.25*0.75}}{0.1})^{2}

n = 124.32

Rounding up

The minimum sample size needed is 125.

5 0
3 years ago
A:36<br> B:39<br> C:54<br> D:108
nordsb [41]
The answer is 36 my friend too the test and I helped him
3 0
2 years ago
NEEEEDD HEEELLLPPPP
rusak2 [61]

Option 2: \frac{x-12}{4} is the correct answer

Step-by-step explanation:

Given fraction is:

\frac{2x-24}{8}

In order to simplify, we can see that the function is already in compact form

So,

We can simplify the given fraction.

We can see that the numerator can be further simplified

\frac{2(x-12)}{8}\\=\frac{x-12}{4}

Hence,

Option 2: \frac{x-12}{4} is the correct answer

Keywords: Polynomials, expressions

Learn more about polynomials at:

  • brainly.com/question/9196410
  • brainly.com/question/9178881

#LearnwithBrainly

8 0
3 years ago
How many times can 42 go into 400?
ki77a [65]
400 divided by 42 = 9.523809
5 0
3 years ago
Read 2 more answers
Which of the following statements is false?
AleksAgata [21]
Statement C is false. 
7 0
3 years ago
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