Chapter 25, Problem 25.19CYS

To determine

To find: The number of “accidental” injuries from the sample

Answer to Problem 25.19CYS

The correct option is (a): 1,552.

Explanation of Solution

Given info:

The survey results were categorized into two categories such “accidental” and “not accidental” are tabulated below:

	Accidental	Not accidental
8-13	205	102
14-18	655	916
19-22	239	533
23-30	363	1,008

Reason for correct answer:

The survey results were categorized into two categories such “accidental” and “not accidental” are tabulated below:

	Accidental	Not accidental
8-13	205	102
14-18	655	916
19-22	239	533
23-30	363	1,008
Total	404	3,906

The total number of accidental injuries in the sample is as follows,

$\begin{array}{c}\left(\begin{array}{l}\text{Total number of }\\ \text{accidental injuries}\end{array}\right)\text{=}295+655+239+363\\ =1,552\end{array}$

Thus, the correct option is (a) 1,552.

Reason for incorrect answers:

By calculation, the total number of accidental injuries in the sample is 1,552. Hence the options (b) 2,559 and (c) 4,111 are incorrect.

Conclusion:

Thus, total number of accidental injuries in the sample is 1,552.

Statistics Concept Introduction

Introduction:

Total number for a category:

The total number for each category is obtained by adding the number of observations or data points in that category.