stats homework help plzz

Question

You measure 41 backpacks' weights, and find they have a mean weight of 49 ounces. Assume the population standard deviation is 12.8 ounces. Based on this, what is the maximal margin of error associated with a 99% confidence interval for the true population mean backpack weight.

Give your answer as a decimal, to two places

Answer 1

margin of error = critical value for 99% CI * standard deviation/square root(sample size(

critical value for 99% CI is found by looking up z-score for probability 0.995 ~= 2.58

rest of information is given and you can plug into formula to get answer