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naomicervero
30.11.2019 •
Mathematics
Astatistician uses chebyshev's theorem to estimate that at least 15 % of a population lies between the values 9 and 20. use this information to find the values of the population mean, μ , and the population standard deviation σ.
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Ответ:
\mu = 14.5\\
\sigma = 5.071\\
k = 1.084
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
Recall Chebyshev's inequality that
Comparing with the Ii equation which is appropriate here we find that
Next what we find is
Thus from the given information we find that
Ответ:
574/x=70/100
x=(100x574)/70
x=820