Chapter 1.1, Problem 23E

(a)

To determine

To calculate the proportion of subjects that was given to control treatment.

Answer to Problem 23E

0.3333

Explanation of Solution

Given:

The response:

			Treatment
		"Smashed into"	"Hit"	Control
Response	Yes	16	7	6
	No	34	43	44

Calculation:

  $\begin{array}{l}\text{Proportion of subjects assign to Control treatment:}\\ \text{=}\frac{\text{Number of responses in control treatment }}{\text{Total no}\text{. of responses}}\\ =\frac{50}{150}\\ =0.3333\end{array}$

(b)

To determine

To explain the distribution of responses.

Answer to Problem 23E

Yes = 0.193

No = 0.807

Explanation of Solution

Calculation:

  

The distribution of the responses is about 20% of the responses are Yes and about 80% of the responses are No.

(c)

To determine

To calculate the percentage of subjects assign to “Smashed into” and the response was “Yes”.

Answer to Problem 23E

The percentage ofsubjects assign to “Smashed into” and the response was “Yes” = 10.7%

Explanation of Solution

Calculation:

The number responses that said “Yes” and assigned in “Smashed into” treatment are 16 and the total no. of responses are 150.

Therefore,

  $\begin{array}{c}\text{Percentage = }\frac{16}{150}\\ =0.107\end{array}$