Sugar packaged by a certain machine has a mean weight of 5 lb and a standard deviation of 0.03 lb. For what values of c can the manufacturer of the machinery claim that the sugar packaged by this machine has a weight between 5 − c and 5 + c lb with probability at least 91%?
at least c =

Question

Sugar packaged by a certain machine has a mean weight of 5 lb and a standard deviation of 0.03 lb. For what values of c can the manufacturer of the machinery claim that the sugar packaged by this machine has a weight between 5 − c and 5 + c lb with probability at least 91%?
at least c =

anonymous · Answer

mean weight = 5Lb + sd 0.03lb
o you know anything about standdard deviation?

anonymous · Answer

yeah, I do. I've been working on these problems and this is my last one. normally for example I would set it up to be 5-.03k=115 and go from there. I'm just unsure how to set this problem up

anonymous · Answer

the firt standar deviation is approxiamately 0.6837 either side from the mean

anonymous · Answer

sorry, 0.6827

anonymous · Answer

can you tell me how you set the problem up?