/sci/ - Science & Math

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STAT Anonymous Mon Sep 19 03:07:08 2011 No.3763372 [Reply] [Original]

Hey /sci/, statistics is my least favorite subject and i'm lost. any help is appreciated.

Basically: Normally distributed, mean = 13 kg, standard deviation = 3.1 kg. What is the probability that a randomly selected bag weights more than 15 kg.

Random back ground for your time.

>>	Anonymous Mon Sep 19 03:09:08 2011 No.3763378 >>3763372 Do you have a calculator?

>>	Anonymous Mon Sep 19 03:10:08 2011 No.3763387 >>3763378 here >>3763372 It's Either A) 0.18659 B) 0.25941 C) 0.32543 D)0.265784 Whats with this high school level math?

>>	Anonymous Mon Sep 19 03:13:08 2011 No.3763397 I know i'm stupid, please help, though.

>>	Anonymous Mon Sep 19 03:16:08 2011 No.3763406 >>3763397 It's B. If you have a calculator there must be a way for you to calculate it.

>>	Anonymous Mon Sep 19 03:22:08 2011 No.3763425 int from 15 to infinity e^(((x-13)/3.1)^2/2)/(sqrt(2pi)3.1)dx you need a calc

>>	Anonymous Mon Sep 19 03:23:08 2011 No.3763428 >>3763425 theres a negative i missed

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