Use the info to answer-suppose a vending machine is designed to reject all coins with weights more than 2 standard deviations above or below the mean weight(grams) est standard deviation in gram
cent 2.500 .06
nickel 5.000 .07
dime 2.268 .05
quarter 5.670 .09
half dollar 11.340 0.13
What would be the range of weights for each coin?
In each case what percentage of legal coins are rejected by the machine?
Please help?