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swat32
4 years ago
15

21/5 = ?/30 raise to higher terms as indicated

Mathematics
2 answers:
liberstina [14]4 years ago
6 0

21/5 = 126/30

If you divide 30 by 5 you get 6, then multiply the 6 into 21 to get 126

8090 [49]4 years ago
4 0
126/30 because 30 divided by 5 equals 6 so 21 times 6 is 126 and when you put that over 30 it is 126/30
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Answer:

\mu = 14.5\\

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Step-by-step explanation:

given that a  statistician uses Chebyshev's Theorem to estimate that at least 15 % of a population lies between the values 9 and 20.

i.e. his findings with respect to probability are

P(9

Recall Chebyshev's inequality that

P(|X-\mu |\geq k\sigma )\leq {\frac {1}{k^{2}}}\\P(|X-\mu |\leq k\sigma )\geq 1-{\frac {1}{k^{2}}}\\

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k\sigma = 5.5\\1-\frac{1}{k^2} =0.15\\\frac{1}{k^2}=0.85\\k=1.084\\1.084 (\sigma) = 5.5\\\sigma = 5.071

Thus from the given information we find that

\mu = 14.5\\\sigma = 5.071\\k = 1.084

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