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PolarNik [594]
3 years ago
13

HELPPP PLEASE THANK UUU :))))

Mathematics
2 answers:
valentinak56 [21]3 years ago
4 0

Answer: 525

Step-by-step explanation:

3/4

x/700

irinina [24]3 years ago
3 0
Answer is 525 .........
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Step-by-step explanation:

We are given the following in the question:

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\text{Standard error} = \dfrac{\sigma}{\sqrt{n}} = \dfrac{13}{\sqrt{5}} = 5.81

5.81 is the standard deviation of Juan's mean result.

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\text{Standard error} = \dfrac{\sigma}{\sqrt{n}}\\\\\Rightarrow \dfrac{13}{\sqrt{n}} = 2.6\\\\\Rightarrow \sqrt{n} = \dfrac{13}{2.6} = 5\\\\\Rightarrow n  = 25

Thus, Juan has to repeat the experiment 25 times to reduce the standard deviation to 2.6

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