Yahoo Answers: Answers and Comments for Statistics probability  normal distribution questions? [Mathematics]
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From Anonymous
enUS
Mon, 22 Jul 2019 01:24:52 +0000
3
Yahoo Answers: Answers and Comments for Statistics probability  normal distribution questions? [Mathematics]
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https://answers.yahoo.com/question/index?qid=20190722012452AAeSWLB
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From Mike G: μ = 20
σ = 2.4
a) z(X=18) = (1820)/2.4 = 0.8...
https://answers.yahoo.com/question/index?qid=20190722012452AAeSWLB
https://answers.yahoo.com/question/index?qid=20190722012452AAeSWLB
Mon, 22 Jul 2019 04:18:18 +0000
μ = 20
σ = 2.4
a) z(X=18) = (1820)/2.4 = 0.8333
From the ztables
P(z<0.8333) = 0.2033
b) To avoid a collision X < 20 m
z = 0
P(z<0) = 0.5000

From Captain Matticus, LandPiratesInc: Find the zscore
(18  20) / 2.4 = 2/2.4 = ...
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https://answers.yahoo.com/question/index?qid=20190722012452AAeSWLB
Mon, 22 Jul 2019 01:42:46 +0000
Find the zscore
(18  20) / 2.4 = 2/2.4 = 10/12 = 5/6 = 0.833333
http://www.ztable.com/
0.2033, or 20.33% of the area lies to the left of 18. You have about a 20.33% chance of stopping in 18 meters or less
You need to stop in 20 meters or less and 50% of the graph lies to the left of the 20m mark on the curve. You have a 50% chance of avoiding the collision