Question

A manufacturer of pharmaceutical products analyzes each batch of a product to verify the concentration of the active ingredient. The chemical analysis is not perfectly precise. In fact, repeated measurements follow a Normal distribution with mean μ equal to the true concentration and with standard deviation σ = 0.0068 grams per liter (g/l). Three analyses of one batch give concentrations of 0.8403, 0.8363, and 0.8447 g/l. To estimate the true concentration, give a 95% confidence interval for μ

Answer 1