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pentagon [3]
3 years ago
5

Answer mah question pleeease~

Mathematics
2 answers:
vazorg [7]3 years ago
7 0
Negative divided by a negative is a positive, so -50/-2=25

Hope this helped! If you have anymore questions or don't understand, just DM me or comment. :)
scoundrel [369]3 years ago
3 0
25.............................................................................                                                       


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Answer:

n=(\frac{2.054(12)}{4})^2 =37.97 \approx 38

So then the minimum sample to ensure the condition given is n= 38

Step-by-step explanation:

Notation

\bar X represent the sample mean for the sample  

\mu population mean (variable of interest)

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n represent the sample size  

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ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}    (a)

And on this case we have that ME =4 and we are interested in order to find the value of n, if we solve n from equation (a) we got:

n=(\frac{z_{\alpha/2} \sigma}{ME})^2   (b)

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n=(\frac{2.054(12)}{4})^2 =37.97 \approx 38

So then the minimum sample to ensure the condition given is n= 38

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