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juin [17]
3 years ago
6

The sum of two numbers is 13, the difference is 4. What are the numbers?

Mathematics
2 answers:
marshall27 [118]3 years ago
7 0

Answer: \frac{17}{2}and \frac{9}{2} or 8.5 and 4.5

Step-by-step explanation:

SSSSS [86.1K]3 years ago
3 0

Answer:

8.5, 4.5

Step-by-step explanation:

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Step-by-step explanation:

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A production manager at a wall clock company wants to test their new wall clocks. The designer claims they have a mean life of 1
Harman [31]

The probability that the mean clock life would differ from the population mean by greater than 12.5 years is 98.30%.

Given mean of 14 years, variance of 25 and sample size is 50.

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μ=14,

σ=\sqrt{25}=5

n=50

s orσ =5/\sqrt{50}=0.7071.

This is 1 subtracted by the  p value of z when X=12.5.

So,

z=X-μ/σ

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=-2.12

P value=0.0170

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Hence the probability that the mean clock life would differ from the population mean by greater than 1.5 years is 98.30%.

Learn more about probability at brainly.com/question/24756209

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There is a mistake in question and correct question is as under:

What is the probability that the mean clock life would differ from the population mean by greater than 12.5 years?

5 0
1 year ago
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