Chapter 1.1, Problem 39E

a.

To determine

To find: The percent of patients that has died with each way of transport.

Answer to Problem 39E

The percentages are 32% and 23.64% respectively.

Explanation of Solution

Given:

Tables are:

	Helicopter	Ambulance	Total
Died	64	260	324
Survived	136	840	976
Total	200	1100	1300

	Serious accidents
	Helicopter	Ambulance	Total
Died	48	60	108
Survived	52	40	92
Total	100	100	200
	Less Serious accidents
	Helicopter	Ambulance	Total
Died	16	200	216
Survived	84	800	884
Total	100	1000	1100

Calculation:

The percent of patients that has died with each way of transport can be calculated as:

  $\begin{array}{c}P\left(\text{Helicopter}\right)=\frac{64}{200}\\ =0.32\\ P\left(\text{Ambulance}\right)=\frac{260}{1100}\\ =0.2364\end{array}$

Thus, the required percentages are 32% and 23.64% respectively.

b.

To determine

To find: The percent of patients that has died with each way of transport for serious and less serious accidents. Also, draw the conclusion from the computed percentages.

Answer to Problem 39E

The people are more likely to die if they are transported from the ambulance.

Explanation of Solution

Calculation:

The percent of patients that has died with each way of transport for the serious accident can be calculated as:

  $\begin{array}{c}P\left(\text{Helicopter}\right)=\frac{48}{100}\\ =0.48\\ P\left(\text{Ambulance}\right)=\frac{60}{100}\\ =0.60\end{array}$

The percentages are 48% and 60% respectively.

Now, the percentages for less serious accidents can be calculated as:

  $\begin{array}{c}P\left(\text{Helicopter}\right)=\frac{16}{100}\\ =0.16\\ P\left(\text{Ambulance}\right)=\frac{20}{1000}\\ =0.20\end{array}$

Thus, the required percentages are 16% and 20% respectively.

c.

To determine

To explain: The possibility of the result of the part (a) given the outcome of part (b).

Explanation of Solution

From the above part, it is known that the most of the people have been transported using ambulance in comparison of the helicopter and for the more serious accidents helicopter has been used in comparison of less serious accidents.