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layla8993
18.12.2020 •
Mathematics
PLEASE HELP DUE SOON
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Ответ:
It's B
Step-by-step explanation:
Slope intercept form is Y=mx +b
(b is sometimes there when slope intersects the y axis)
Ответ:
(a) X has a probabiliity density of
If the lower quartile is 5 and the upper quartile is 9, then
Computing the integrals gives the following system of equations:
5 - a = 0.25 (b - a) ==> 0.75a + 0.25b = 5 ==> 3a + b = 20
b - 9 = 0.25 (b - a) ==> 0.25a + 0.75b = 9 ==> a + 3b = 36
Eliminate a :
(3a + b) - 3 (a + 3b) = 20 - 3×36
-8b = -88
==> b = 11 ==> a = 3
and so P(X = x) = 1/(11 - 3) = 1/8 for all 3 < x < 11.
(b)
(c) The distribution function is then