Consider the regression model fit to the nisin extraction data in Exercise 12-18. Use nisin extraction as
Question:
(a) Test for significance of regression using α = 0.05. What is the P-value for this test?
(b) Construct a t-test on each regression coefficient. What conclusions can you draw about the variables in this model? Use α = 0.05.
(c) Comment on the effect of a small sample size to the tests in the previous parts.
Exercise 12-18
An article in Biotechnology Progress (2001, Vol. 17, pp. 366368) reported on an experiment to investigate and optimize nisin extraction in aqueous two-phase systems (ATPS). The nisin recovery was the dependent variable (y). The two regressor variables were concentration (%) of PEG 4000 (denoted as x1 and concentration (%) of Na2SO4 (denoted as x2). The data are in Table E12-10.
Step by Step Answer:
Applied Statistics And Probability For Engineers
ISBN: 9781118539712
6th Edition
Authors: Douglas C. Montgomery, George C. Runger