due to a variation in lab techniques, impurities in material, and other unknown factors, the results of an experiment in a chemistry lab will not always yield the same numerical answer. In an electrolysis experiment a class measured the amount of copper precipitated over a 30- min period. the n= 30students calculated a sample mean of .145 mole and standard deviation of 0.0051 mole. Find a 90% confidence interval for the mean amount of copper precipitated a solution over 30-min period. HELP PLEASE!!

Question

due to a variation in lab techniques, impurities in material, and other unknown factors, the results of an experiment in a chemistry lab will not always yield the same numerical answer. In an electrolysis experiment a class measured the amount of copper precipitated over  a 30- min period. the n= 30students calculated a sample mean of .145 mole and standard deviation of 0.0051 mole. Find a 90% confidence interval for the mean amount of copper precipitated a solution over 30-min period. HELP PLEASE!!