Question

1.1 QUESTION 1 Express Bus Company maintenance depot collected the following records (corrective mean times) for replacement of a bearing over a period. 40 58 43 45 63 83 75 66 93 92 71 52 55 64 37 62 72 97 76 75 75 64 48 39 69 71 46 59 68 64 67 41 54 30 53 48 83 33 50 63 86 74 51 72 87 37 57 59 65 63 1.1.1 Calculate the mean and standard deviation of the corrective maintenance times Mct and $sigma$. Fran Ps 60 1.1.2 Calculate the probability that a maintenance process takes between 40 and 50 minutes. Use the table provided. (4) (3) 14

          1.1
QUESTION 1
Express Bus Company maintenance depot collected the following records (corrective
mean times) for replacement of a bearing over a period.
40
58
43
45
63
83
75
66
93
92
71
52
55
64
37
62
72
97
76
75
75
64
48
39
69
71
46
59
68
64
67
41
54
30
53
48
83
33
50
63
86
74
51
72
87
37
57
59
65
63
1.1.1 Calculate the mean and standard deviation of the corrective maintenance
times Mct and $sigma$.
Fran Ps 60
1.1.2 Calculate the probability that a maintenance process takes between 40 and
50 minutes. Use the table provided.
(4)
(3)
14

1.1
QUESTION 1
Express Bus Company maintenance depot collected the following records (corrective
mean times) for replacement of a bearing over a period.
40
58
43
45
63
83
75
66
93
92
71
52
55
64
37
62
72
97
76
75
75
64
48
39
69
71
46
59
68
64
67
41
54
30
53
48
83
33
50
63
86
74
51
72
87
37
57
59
65
63
1.1.1 Calculate the mean and standard deviation of the corrective maintenance
times Mct and sigma.
Fran Ps 60
1.1.2 Calculate the probability that a maintenance process takes between 40 and
50 minutes. Use the table provided.
(4)
(3)
14

Added by Sarah J.

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