Free Exam: STAT 324Final Examination First Semester 1434 - 1435 H
Number of Questions in Test: 39
Number of Questions in Preview: 5
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Disks of polycarbonate plastic from a supplier are analyzed for scratch and shock resistance. The results from 100 disks are summarized as follows:
If a disk is selected at random, the probability that its scratch resistance is high and its shock resistance is high is
| High Shock resistance | Low Shock resistance | |
| High Scratch resistance | 70 | 10 |
| Low Scratch resistance | 16 | 4 |
If a disk is selected at random, the probability that its scratch resistance is high and its shock resistance is high is
| Type: | Multiple choice |
| Points: | 1 |
| Randomize answers: | Yes |
Question 2
Disks of polycarbonate plastic from a supplier are analyzed for scratch and shock resistance. The results from 100 disks are summarized as follows:
If a disk is selected at random, the probability that its scratch resistance is high or its shock resistance is high is
| High Shock resistance | Low Shock resistance | |
| High Scratch resistance | 70 | 10 |
| Low Scratch resistance | 16 | 4 |
If a disk is selected at random, the probability that its scratch resistance is high or its shock resistance is high is
| Type: | Multiple choice |
| Points: | 1 |
| Randomize answers: | Yes |
Question 3
Disks of polycarbonate plastic from a supplier are analyzed for scratch and shock resistance. The results from 100 disks are summarized as follows:
If a disk is selected at random, the probability that its shock resistance is low given that its scratch resistance is low is
| High Shock resistance | Low Shock resistance | |
| High Scratch resistance | 70 | 104 |
| Low Scratch resistance | 16 |
If a disk is selected at random, the probability that its shock resistance is low given that its scratch resistance is low is
| Type: | Multiple choice |
| Points: | 1 |
| Randomize answers: | Yes |
Question 4
If the events A and B are independent then always
| Type: | Multiple choice |
| Points: | 1 |
| Randomize answers: | Yes |
Question 5
If P(A) = 0.6 , P(B) = 0.5 and P(A|B) = 0.8, then
P(A∪B) is equal to:
P(A∪B) is equal to:
| Type: | Multiple choice |
| Points: | 1 |
| Randomize answers: | Yes |