Answer
$i. 30±k(6) = [15,45]$
$30-6k = 15$
$k = 2.5$
$1-\frac{1}{2.5^2} = (1-0.16) \times100 = 84%$
$ii.30±k(6) = [12,48]$
$30-6k = 12$
$k = 3$
$1-\frac{1}{3^2} = (1-1/9)\times100 = 88.89%$
$b. 1-\frac{1}{k^2} = 0.75$
$1/k^2 = 0.25$
$k = 2$
$Interval = [30-2(6), 30+2(6)]$
$=[18,42]$
Work Step by Step
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