ASAP!!!!!!!!! PLEASE help me with this question! This is really urgent! No nonsense answers please.
1 answer:
intuitively, when you take B so far, the lines will have to less "steep" to be tangent to circle so the angle between them will also decrease.
so when you take B closer, increases
not sure if C lies on the line joining B and center, but if it does,
then again you can visualise that when the point is Far, the intersection points are more distant, reducing the angle
and when the point is very close to circle, the tangents $m\angle GCD$ will increase
and at extreme, when B is on the circle, it will become a straight line, and $\angle GCD$ wil become $180^{\circ}$
so it increases when you move closer. hence option 2
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percent of the observations lie within plus and minus 2.5 standard deviations of the mean is 84%
according to Chebyshev's theorem k=2.5
Chebyshev theorem:
The minimum percentage of observations that are within a given range of standard deviations from the mean is calculated using Chebyshev's Theorem. Numerous other probability distributions can be applied with this theorem. Chebyshev's Inequality is another name for Chebyshev's Theorem.
This indicates that 1 - of the distribution will be close to the mean, or within k standard deviations.
Therefore, 1 -
⇒ 1-
⇒1-
⇒
⇒0.84
percent of the observations lie within plus and minus 2.5 standard deviations of the mean is 84%
Learn more about standard deviations here:
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