a.
To explain: The reason of doing random assignment in the provided study.
a.
Answer to Problem 12PT
To involve all the variables in the study.
Explanation of Solution
Given:
The table is:
Treatment | No subsequent arrest | Subsequent arrest |
Advise and separate | 187 | 25 |
Citation | 181 | 43 |
Arrest | 175 | 39 |
In this study random assignment has been done to involve all the variables in the study and eliminate the effect of any variables which are not involved in the provided study.
b.
To draw: A graph to show the effectiveness of all three treatments.
b.
Explanation of Solution
Graph:
The graph is constructed as:
c.
To provide: The null and alternative hypotheses.
c.
Explanation of Solution
Calculation:
The null and alternative hypotheses are:
d.
To draw: The conclusion if the p -value is 0.0796.
d.
Explanation of Solution
Calculation:
The p -value < 0.05. The null hypothesis is rejected. Thus, at 5% significance level there is sufficient evidence to reject the claim that all the proportions are equal.
Chapter 11 Solutions
The Practice of Statistics for AP - 4th Edition
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