see your standard Z table. Here is a useful site:
http://davidmlane.com/hyperstat/z_table.html
A sample of 120 bags of potatoes produced by a factory was found to have a mean weight of
2.47 kg and a standard deviation of 0.12 kg. Obtain a 95% confidence interval for the mean weight of all bags of potatoes produced by the factory.
1 answer
1 answer