Chapter 3, Problem 12E

(a)

To determine

To find: that is it reasonable to conclude weather or mechanical failures.

Answer to Problem 12E

Reasonable

Explanation of Solution

Given:

Cause	Percent
Pilot error	40
other human error	5
weather	6
mechanical failure	14
sabotage	6

By seeing the table, it is observed that these are the categorical data. It can add the reason is that categories don’t overlap.

(b)

To determine

To find: the percent of crashes were the causes not determined.

Answer to Problem 12E

29%

Explanation of Solution

Calculation:

Therefore, the percent of crashes not listed here

100% - 71% = 29%

(c)

To determine

To Explain: an appropriate represent for these data.

Answer to Problem 12E

Bar chart or pie chart

Explanation of Solution

Given:

Cause	Percent
Pilot error	40
other human error	5
weather	6
mechanical failure	14
sabotage	6

Graph:

  

For the given data either pie chart or bar chart are appropriate. A bar chart is constructed above where pilot error is the highest and other human error is the lowest.