Time

(months)

$t_i$

Frequency

$f_i$

Number of Failures

$d_i$

Number Censored

$C_i$

Risk Set

$n_i$

Survival Probabilities

$\widehat{S}\left(t\right)$

Nelson-Aalen Hazard Rates

$\tilde{H}\left(t\right)$

0

0

0

0

50

1.00

0.00

1

8

6

2

50

0.88

0.12

2

6

3

3

42

0.82

0.19

3

5

3

2

36

0.75

0.27

4

4

3

1

31

0.68

0.37

5

4

3

1

27

0.60

0.48

6

3

2

1

23

0.55

0.57

7

3

2

1

20

0.50

0.67

8

2

2

0

17

0.44

0.79

9

2

2

0

15

0.38

0.92

10

2

2

0

13

0.32

1.07

11

2

1

1

11

0.29

1.17

12

1

1

0

9

0.26

1.28

13

1

1

0

8

0.23

1.40

14

2

2

0

7

0.16

1.69

15

2

2

0

5

0.10

2.09

19

1

0*

1

3

̶

̶

22

1

1

0

2

0.05

2.57

24

1

0*

1

1

̶

̶