E=CV(SD/square root of n)
E=1.96(70/square root of 20)
E=6.86
mean-e<mean<mean+e
350 - 6.86 < 350 < 350 + 6.86
343.14 < mean < 356.86
I think that is right
A random sample of 20 hogs on farmer Brown's hog farm had an average weight of 350 pounds and a SD of 70 pounds. Find 95% confidence interval estimate of the mean weight of all farmer Brown's pigs.
1 answer
6 answers