Question 17 Class interval (hours)| # pumps failed (frequency) 1000 – 1100 20 1100 – 1200 32 1200 – 1300 54 1300 – 1400 66 1400 – 1500 48 1500 – 1600 32 1600 – 1700 11 1700 – 1800 7 1800 1900 Randomly selected pumps of a particular brand have been running continuously and their life-times noted in above given schedule. 4 Find the survival probability or reliability at time = 1300 Hrs Round answer to TWO decimal places.

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Question 17
Class interval (hours) # pumps failed (frequency)
1000 – 1100
20
1100 – 1200
32
1200 – 1300
54
1300 – 1400
66
1400 - 1500
48
1500 – 1600
32
1600 – 1700
11
1700 – 1800
7
1800 - 1900
4
Randomly selected pumps of a particular brand have been running continuously and their life-times noted in above
given schedule.
Find the survival probability or reliability at time = 1300 Hrs
Round answer to TWO decimal places.
Transcribed Image Text:Question 17 Class interval (hours) # pumps failed (frequency) 1000 – 1100 20 1100 – 1200 32 1200 – 1300 54 1300 – 1400 66 1400 - 1500 48 1500 – 1600 32 1600 – 1700 11 1700 – 1800 7 1800 - 1900 4 Randomly selected pumps of a particular brand have been running continuously and their life-times noted in above given schedule. Find the survival probability or reliability at time = 1300 Hrs Round answer to TWO decimal places.
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