Chapter 4.2, Problem 61E

(a)

To determine

To explain: the experiment 's design and what is called this sort of design.

Answer to Problem 61E

Totally randomised system

Explanation of Solution

Given:

  

Graph:

This is a totally randomised system, since the treatments are distributed entirely by chance to all experimental units in a strictly randomised system. The following description is provided:

  

Here 36 headache patients with four drugs are assigned randomly: the antidepressant. placebo, Antidepressant plus stress and placebo plus stress. The total 36 headaches are able to be picked the total number and magnitude of headaches are our response variable.

(b)

To determine

To Explain: how the groups will then be randomly assigned to the four treatment classes.

Explanation of Solution

Given:

  

By way of slips of paper, the subjects can be assigned randomly to four treatment classes. 36 equivalent paper names for each of 36 patients are created to execute the concept. In a jar position it, mix it correctly and draw 9 slips. Class 1 is assigned to the first nine patients. Draw another 9 slips of names and add them to Category 2. Draw 9 new names and appoint them to Group 3 and the remaining 9 patients to Group 4. Compare in the four categories the average amount of headaches and their severity after six months.