SOLUTION: if 5% if screws produced by a machine are defective ,wat are the mean & standard deviation respectively in total of 500 screws?

Algebra ->  Probability-and-statistics -> SOLUTION: if 5% if screws produced by a machine are defective ,wat are the mean & standard deviation respectively in total of 500 screws?       Log On


   

Question 1090454: if 5% if screws produced by a machine are defective ,wat are the mean & standard deviation respectively in total of 500 screws?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
if 5% of screws produced by a machine are defective ,what are the mean & standard deviation respectively in total of 500 screws?
------
Binomial events::
mean = n*p = 500*0.05 = 25
std = sqrt(npq) = sqrt(25*0.95) = 4.87
------------
Cheers,
Stan H.
----------