Question

a sample of nonconforming cans is selected and each can is categorized according to the reason for nonconformity and which production line produced each can. the contingency table for the reason for non - performance and production line is shown below.
production line reason for nonconformity
count blemish crack location missing other total
1 34 65 17 21 13 150
2 23 52 25 19 6 125
3 32 28 16 14 10 100
total 89 145 58 54 29 375
what proportion of cans from production line 2 were reported as having a crack?
52/375
52/145
52/125
145/375

Explanation:

Step1: Identify relevant values

Number of cracked cans from line 2 is 52, total cans from line 2 is 125.

Answer:

52/125