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March 1, 2015

March 1, 2015

Posted by **Samantha** on Saturday, August 8, 2009 at 7:34pm.

Is the answer 0.0107? Anyone please

- Alegebra -
**J.J.**, Saturday, August 8, 2009 at 9:25pmcan some one please help me!!!

- Alegebra -
**Marth**, Saturday, August 8, 2009 at 9:38pmYou are given the normal model N(450, 50)

Find the z score for 335 seconds.

z = (x-u)/s

where u = mu and s = sigma.

z = (335-450)/50

z = -2.3

Now use the normal cumulative distribution function on a calculator or program to find the P(z<-2.3)

normalCDF(-99,-2.3) = .0107

- Alegebra -
**Maria**, Sunday, August 9, 2009 at 8:20pmMarth this are my choices

A) 0.9893

B) 0.0107

C) 0.4893

D) 0.5107

So I'm assuming it's letter B? correct

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