Sugar packaged by a certain machine has a mean weight of 5 lb and a standard deviation of 0.02 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 99%? (Round your answer to two decimal places.)

Question

amistre64 · Answer

sounds like confidence interval

amistre64 · Answer

$$n=\frac{(z\sigma)^2}{E^2}$$
this looks familiar to me

amistre64 · Answer

so the Error would be:

$$E=\frac{z_a\sigma}{\sqrt{n}}$$
maybe

amistre64 · Answer

and of course z corresonds to the test statisitic of 99%; meansing we got 1/2% in each tail