![Student ID: Problem #111 20 marks The IQ in a population is U(70,130). Answer the following. f 6 a) [6pts] What is the mean a](http://img.homeworklib.com/questions/f313b5c0-ab5c-11eb-8b12-ff9767d3b903.png?x-oss-process=image/resize,w_560)
Homework Answers
a) mean = (a+b)/2
= (70+130) / 2
=200 / 2
= 100
variance = (b-a)^2/12
= (130-70)2 /12
= 3600 / 12
= 300
b)
Pr[x > 115] = x - b /b - a
= (130 - 115) /(170 - 30)
= 15 / 60
= 0.25
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