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Disks of polycarbonate plastic from a
Chapter 2, Problem 146E(choose chapter or problem)
Problem 146E
Disks of polycarbonate plastic from a supplier are analyzed for scratch and shock resistance. The results from 100 disks are summarized as follows:
Shock |
Resistance |
||
High |
Low |
||
Scratch |
High |
70 |
9 |
Resistance |
Low |
16 |
5 |
Let A denote the event that a disk has high shock resistance, and let B denote the event that a disk has high scratch resistance. Are events A and B independent?
Questions & Answers
QUESTION:
Problem 146E
Disks of polycarbonate plastic from a supplier are analyzed for scratch and shock resistance. The results from 100 disks are summarized as follows:
Shock |
Resistance |
||
High |
Low |
||
Scratch |
High |
70 |
9 |
Resistance |
Low |
16 |
5 |
Let A denote the event that a disk has high shock resistance, and let B denote the event that a disk has high scratch resistance. Are events A and B independent?
ANSWER: