Sampling is a process of examining a representative number of items out of a whole population.
- Systematic sampling involves selecting every nth item after selecting the first item randomly.
- Stratified sampling involves taking random samples from within a group in the population that each group bears to the population as a whole.
- Multi-stage sampling is similar to stratified sampling except that the groups are geographically based.
- Cluster sampling involves selecting a few areas at random and every single item in the area is interviewed.
- Quota sampling involves choosing on the spot up to a given quota. An interviewer selects interviewee from given categories up to a given quota.
Wilfykil answered the question on February 20, 2019 at 10:02
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Caterpillar Company Ltd. produces generators and drilling engines. The revenue function that describes total revenue for sales in a particular quarter of these engines is given by:
R = 8x + 5y + 2xy – x2 – 2y2 + 20
Where:
x – number of generator engines in thousands.
y – number of drilling engines in thousands.
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Date posted: February 20, 2019. Answers (1)
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Required:
Draw the cost, revenue and profit functions and from it:
i) Determine the break-even level of production.
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Date posted: February 20, 2019. Answers (1)
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Required:
i) Determine the critical path.
ii) Determine the minimum time and minimum cost for the networks.
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Date posted: February 20, 2019. Answers (1)
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Due to hard economic times and restriction by City Council, sales...(Solved)
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Date posted: February 20, 2019. Answers (1)
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iii) Strategy.
iv) Rules of dominance(Solved)
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iii) Strategy.
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Date posted: February 20, 2019. Answers (1)
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Required:
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Date posted: February 20, 2019. Answers (1)
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Date posted: February 20, 2019. Answers (1)
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Date posted: February 20, 2019. Answers (1)
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Date posted: February 20, 2019. Answers (1)
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Date posted: February 20, 2019. Answers (1)
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Date posted: February 20, 2019. Answers (1)
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Given the following distribution of wages for 500 technicians in motor companies in industrial area.
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Date posted: February 20, 2019. Answers (1)
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iii) Collective exhaustive events
iv) Equally likely events
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Date posted: February 20, 2019. Answers (1)
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A survey by Marketing Society here in Kenya found out the following buying habits of household air conditioners considered a luxury.
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Date posted: February 20, 2019. Answers (1)
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ii) Coefficient of skewness.
iii) Quartile deviation.
Date posted: February 20, 2019. Answers (1)
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Three industries, packaging P, Bakery B, and Flour F are related with the intermediate demand matrix below.
Required:
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ii) Comment on the total output for industries.
Date posted: February 20, 2019. Answers (1)
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i) Final demand.
ii) Technical coefficients.
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Date posted: February 20, 2019. Answers (1)
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Lillian Wambugu is the project manager of Jokete Construction Company. The company is bidding a contract to install telephone lines in a small town. It has identified the following activities along with their predecessor restrictions, expected times and worker requirements:
Lillian Wambugu has agreed with the client that the project should be completed in the shortest duration.
Required:
i) Draw a network for the project.
ii) Determine the critical path and the shortest project duration.
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Date posted: February 20, 2019. Answers (1)
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Date posted: February 20, 2019. Answers (1)
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Date posted: February 20, 2019. Answers (1)