Statistics questions

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Mathematics

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Explanation & Answer

sigma(std dev) 300
mu(mean) 1500  
z value for 839 -1.10167 (x-mu)/(2*sigma)
z value for 1740 0.4 (x-mu)/(2*sigma)
P(z<-1.10167) 0.013786 Use normdist functin in excel
P(z<0.4) 0.788145 Use normdist functin in excel
P(-1.1<z<0.4) 0.774359 P(z<0.4)-P(z<-1.10167)


Anonymous
I was having a hard time with this subject, and this was a great help.

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