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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[size=4] Disks of polycarbonate plastic from a supplier are analyzed for scratch and shock resistance. The results from 100 disks are summarized as follows:
[/size]
[table][tr][td]
[/td][td][size=4]High Shock resistance
[/size][/td][td][size=4]Low Shock resistance
[/size][/td][/tr][tr][td][size=4]High Scratch resistance
[/size][/td][td][size=4]70[/size][/td][td][size=4]10[/size][/td][/tr][tr][td][size=4]Low Scratch resistance
[/size][/td][td][size=4]16[/size][/td][td][size=4]4[/size][/td][/tr][/table]
[size=4] If a disk is selected at random, the probability that its scratch resistance is high and its shock resistance is high is [/size]
[/size]
[table][tr][td]
[/td][td][size=4]High Shock resistance
[/size][/td][td][size=4]Low Shock resistance
[/size][/td][/tr][tr][td][size=4]High Scratch resistance
[/size][/td][td][size=4]70[/size][/td][td][size=4]10[/size][/td][/tr][tr][td][size=4]Low Scratch resistance
[/size][/td][td][size=4]16[/size][/td][td][size=4]4[/size][/td][/tr][/table]
[size=4] If a disk is selected at random, the probability that its scratch resistance is high and its shock resistance is high is [/size]
| Type: | Multiple choice |
| Points: | 1 |
| Randomize answers: | Yes |
Question 2
[size=4] Disks of polycarbonate plastic from a supplier are analyzed for scratch and shock resistance. The results from 100 disks are summarized as follows:[/size]
[table][tr][td]
[/td][td][size=4]High Shock resistance
[/size][/td][td][size=4]Low Shock resistance
[/size][/td][/tr][tr][td][size=4]High Scratch resistance
[/size][/td][td][size=4]70[/size][/td][td][size=4]10[/size][/td][/tr][tr][td][size=4]Low Scratch resistance
[/size][/td][td][size=4]16[/size][/td][td][size=4]4[/size][/td][/tr][/table]
[size=4]If a disk is selected at random, the probability that its scratch resistance is high or its shock resistance is high is [/size]
[table][tr][td]
[/td][td][size=4]High Shock resistance
[/size][/td][td][size=4]Low Shock resistance
[/size][/td][/tr][tr][td][size=4]High Scratch resistance
[/size][/td][td][size=4]70[/size][/td][td][size=4]10[/size][/td][/tr][tr][td][size=4]Low Scratch resistance
[/size][/td][td][size=4]16[/size][/td][td][size=4]4[/size][/td][/tr][/table]
[size=4]If a disk is selected at random, the probability that its scratch resistance is high or its shock resistance is high is [/size]
| Type: | Multiple choice |
| Points: | 1 |
| Randomize answers: | Yes |
Question 3
[size=4] Disks of polycarbonate plastic from a supplier are analyzed for scratch and shock resistance. The results from 100 disks are summarized as follows:
[/size]
[table][tr][td]
[/td][td][size=4]High Shock resistance
[/size][/td][td][size=4]Low Shock resistance
[/size][/td][/tr][tr][td][size=4]High Scratch resistance
[/size][/td][td][size=4]70[/size][/td][td][size=4]104[/size][/td][/tr][tr][td][size=4]Low Scratch resistance
[/size][/td][td][size=4]16[/size][/td][td]
[/td][/tr][/table]
[size=4]If a disk is selected at random, the probability that its shock resistance is low given that its scratch resistance is low is [/size]
[/size]
[table][tr][td]
[/td][td][size=4]High Shock resistance
[/size][/td][td][size=4]Low Shock resistance
[/size][/td][/tr][tr][td][size=4]High Scratch resistance
[/size][/td][td][size=4]70[/size][/td][td][size=4]104[/size][/td][/tr][tr][td][size=4]Low Scratch resistance
[/size][/td][td][size=4]16[/size][/td][td]
[/td][/tr][/table]
[size=4]If a disk is selected at random, the probability that its shock resistance is low given that its scratch resistance is low is [/size]
| Type: | Multiple choice |
| Points: | 1 |
| Randomize answers: | Yes |
Question 4
[size=4]If the events A and B are independent then always[/size]
| Type: | Multiple choice |
| Points: | 1 |
| Randomize answers: | Yes |
Question 5
[size=4]If P(A) = 0.6 , P(B) = 0.5 and P(A|B) = 0.8, then[/size]
[size=4]P(A∪B) is equal to:[/size]
[size=4]P(A∪B) is equal to:[/size]
| Type: | Multiple choice |
| Points: | 1 |
| Randomize answers: | Yes |