QMI1500 ASSESSMENT 3 SEM 1 OF 2024 EXPECTED SOLUTIONS

Question 1 Three workers on the same job showed the following results over a long period of
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1.00 Worker
Flag Mpho Tumelo Siphiwe
question ¯
x̄¯¯���: Mean time of completing the 25 25 24 24 19 19
job (minutes)

S x̄¯¯ ������
¯ : Standard deviation
66 77 55
(minutes)


Calculate the coefficient of variation of the time that each worker required to
complete the job. The worker that appears to be more consistent in the time he
required to complete the job is

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a. Siphiwe.
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b. Tumelo.


c. can only be determined if more information is provided.


d. Mpho.

, Buhle wants to save R330 284,00 R330284,00 within the next four years. She makes equal monthly deposits
at the end of each month starting after one month and her savings accumulate interest at 12,5% 12,5% per
annum, compounded monthly. The size of each of the monthly deposits is



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a. R200 846,13 R200846,13.
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b. R68 602,60 R68602,60.


c. R8 778,95 R8778,95.


d. R5 338,49 R5338,49.