Chapter 6.2, Problem 6.42E

(a)

To determine

To describe the design of this experiment.

Explanation of Solution

  $\begin{array}{l}\text{10 rats of two genetic strains each}\text{.}\\ \text{Diet A: 5 rats of each strain}\text{.}\\ \text{Diet B: 5 rats of each strain}\text{.}\end{array}$

The outline is as;

  

(b)

To determine

To describe the required randomization using table B.

Explanation of Solution

First strain:

  $\begin{array}{l}\text{Randomly assign a unique to each rat of the first strain (0,1,2,}\mathrm{....}\text{,9)}\text{.}\\ \text{Use line 111 of table B}\text{.}\\ \text{Select the first 5 digits}\text{. The corresponding rats will be in the group for diet A}\text{. If one}\\ \text{of the digits is repeated, new digits need to be selected for the repetitions}\text{.}\\ \text{8,1,4,8,6,6,9}\\ \text{The remaining rats will be assigned to diet B}\text{.}\\ \text{Diet A: 8,1,4,6,9}\\ \text{Diet B: 2,3,5,7,0}\end{array}$

Second Strain:

  $\begin{array}{l}\text{Randomly assign a unique to each rat of the first strain (0,1,2,}\mathrm{....}\text{,9)}\text{.}\\ \text{Use line 111 of table B}\text{.}\\ \text{Select the first 5 digits}\text{. The corresponding rats will be in the group for diet A}\text{. If one}\\ \text{of the digits is repeated, new digits need to be selected for the repetitions}\text{.}\\ 4,8,7,6,0\\ \text{The remaining rats will be assigned to diet B}\text{.}\\ \text{Diet A: 4,8,7,6,0}\\ \text{Diet B: 1,2,3,5,9}\end{array}$