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Normal Distribution

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asked Oct 23, 2014 in STATISTICS by anonymous

1 Answer

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 z score value of 97.5% is 2.2414 .

( The values of z score taken from z score table )

Mean score μ = 12   standard deviation σ =3

image 

2.2414 = ( x - 12 ) / 3

x - 12 = 2.2414*3

x - 12 = 6.7242

x = 6.7242 + 12

x = 18.7242 ≈ 19 min

The time to reach stanely hall is 19 min

The class work will start at 10:10 AM 

The time to start from  dorm is  10:10 -19 min = 9:51 AM

So one has to start from dorm to stanely hall at  9:51 AM .

answered Oct 24, 2014 by friend Mentor

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