1. An electric circuit has six resistors wired in series, each nominally being 5 ohms. What is the maximum standard deviation that can be allowed in the manufacture of these resistors if the combined circuit resistance is to have a standard deviation no greater than 0.4 ohm?
2. Suppose the length of time, in minutes, that you have to wait at a bank teller's window is unifonnly distributed over the interval (0, 10).lfyou go to the bank four times during the neKt month, what is the probability that your second longest wait will be less than 5 minutes?
3. A random sample of size n = 6 is taken from the pdf .fr( y ) == 3y2 , 0 :::: y 5. 1. Find P(Y5 > 0.75).