Suppose a binomial event has a probability of success of 0.1 and 750 trials are performed. What is the standard deviation of the possible outcomes?

Question

anonymous · Answer

st.dev.=sqrt( n*p*(1-p) )

So you have p=0.1 and n=750 

st.dev=sqrt( 750* 0.1*0.9)

dan815 · Answer

uhh here is a more natural approach if u dont wanna believe in the formula yet

dan815 · Answer

you know that in 1 standard deviation about 68% of the outcomes have to exist closed to the mean

hockeychick23 · Answer

oh wow that was actually a lot quicker than i thought, thanks, and yep

dan815 · Answer

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