An experiment was performed to assess the effects of a change in the manufacturing procedure on the
Question:
An experiment was performed to assess the effects of a change in the manufacturing procedure on the average potency of a tablet product. A new batch of antibiotic tablets was made with a modification of the usual manufacturing procedure. Twelve tablets were assayed and the results are shown in the table below. Test, at the 90% level of confidence, if the process modification results in a difference in the sample mean potency from the population mean potency of the tablets of 4.00 mg. Assume the data are from a normally distributed population. Potency of tablets (mg) using modified procedure. 4.13 4.04 4.09 4.00 3.98 4.03 4.01 3.99 4.20 4.08 3.96 4.18
Applied Regression Analysis and Other Multivariable Methods
ISBN: 978-1285051086
5th edition
Authors: David G. Kleinbaum, Lawrence L. Kupper, Azhar Nizam, Eli S. Rosenberg