Business, 11.06.2021 22:20 bunnybuge4
Q1 (a) As part of an investigation into levels of overtime working, a company decides to tabulate the number of orders received weekly and compare this with the total weekly overtime worked to give the following
Week
1
2
3
4
5
6
7
8
9
10
Orders received
83
22
107
55
48
92
135
32
67
122
Total overtime
38
9
42
18
11
30
48
10
29
51
Using the method of least squares obtain the regression equation of total overtime on orders received and predict the level of total overtime necessary for 100 orders (7 marks)
(b) As a result of tests of 20,000 electric bulbs manufactured by a company it was found that lifetime of the bulbs are normally distributed with an average life of 2040 hours and standard deviation of60 hours. On the basis of the information, estimate the number of bulbs expected to burn for;
(i) More than 2150 hours
(ii) Less than 1960 hours
Answers: 2
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Q1 (a) As part of an investigation into levels of overtime working, a company decides to tabulate th...
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