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
-
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...
(Solved)
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.
At what quantities of x and y is revenue maximised in a particular quarter
Date posted:
February 20, 2019
.
Answers (1)
-
Kiko Manufacturing Ltd. wants to take a decision of introducing a new soap Kikope. The cost for introducing Kikope (Initial advertising, promotion and fixed cost...
(Solved)
Kiko Manufacturing Ltd. wants to take a decision of introducing a new soap Kikope. The cost for introducing Kikope (Initial advertising, promotion and fixed cost for one year of production) is estimated at Ksh.30,000. The variable cost per bar of soap is Ksh.30 and the expected selling price is Ksh.50.
Required:
Draw the cost, revenue and profit functions and from it:
i) Determine the break-even level of production.
ii) Determine the profit on the sale of 2,500 soap bars.
Date posted:
February 20, 2019
.
Answers (1)
-
Vick Press Ltd is planning to expanding into offering security systems in people?s homes scared
of security.The following are activities and associated costs for the expansion:
(Solved)
Vick Press Ltd is planning to expanding into offering security systems in people‟s homes scared of security.The following are activities and associated costs for the expansion:
Required:
i) Determine the critical path.
ii) Determine the minimum time and minimum cost for the networks.
iii) Given that, for every delay beyond 40th week, there is share of Sh.1,000 per week loss of profit. Is it advisable to crash the project from 51 to 45 weeks? Why?
Date posted:
February 20, 2019
.
Answers (1)
-
Peter and Ngomongo are second hand dealers of electronic equipment and shoes along Baricho road.
Due to hard economic times and restriction by City Council, sales...
(Solved)
Peter and Ngomongo are second hand dealers of electronic equipment and shoes along Baricho road. Due to hard economic times and restriction by City Council, sales have been decreasing. Each of them came up with strategies to expand into the other business (they have monopoly now). Each of them knows what the other is considering thus influences each others decision. Peter had the following matrix of profit per day.
Required:
i) Interpret the matrix.
ii) Solve the game to determine the average winning (loss) each cousin would have
Date posted:
February 20, 2019
.
Answers (1)
-
Define the following as used in game theory:
i) N – person game.
ii) Saddle point.
iii) Strategy.
iv) Rules of dominance
(Solved)
Define the following as used in game theory:
i) N – person game.
ii) Saddle point.
iii) Strategy.
iv) Rules of dominance
Date posted:
February 20, 2019
.
Answers (1)
-
Zadock ltd. manufactures various kinds of furniture namely ordinary chairs, baby cots, and executive chairs. All the products use raw material (wood), machine time (lathe)...
(Solved)
Zadock ltd. manufactures various kinds of furniture namely ordinary chairs, baby cots, and executive chairs. All the products use raw material (wood), machine time (lathe) and manual labour (technicians). The requirements for the furniture are summarised as below.
Required:
i) Formulate the linear programming problem into standard form for input to the computer spreadsheet
ii) What are the units of each kind of furniture to be produced to maximise profits. What is the maximum profit?
iii) Is there any resource that is not used up? For the used up resource if any, how much would you pay for one additional unit.
Date posted:
February 20, 2019
.
Answers (1)
-
What are the underlying assumptions in linear programming?
(Solved)
What are the underlying assumptions in linear programming?
Date posted:
February 20, 2019
.
Answers (1)
-
The following data relates business turnover and staff of fast moving consumer goods company EAI Ltd:
(Solved)
The following data relates business turnover and staff of fast moving consumer goods company EAI Ltd:
Required:
i) Fit an appropriate regression equation.
ii) Estimate the staff requirement when business turnover reaches Sh.200 Million
Date posted:
February 20, 2019
.
Answers (1)
-
A research studying the role of stress and its implication on personal life in respect of job change over by low cadre staff, came up...
(Solved)
A research studying the role of stress and its implication on personal life in respect of job change over by low cadre staff, came up with the following data. It relates to 30 firms over 3-year period
By fitting a Poisson distribution to get expected frequency, test its goodness of fit.
Date posted:
February 20, 2019
.
Answers (1)
-
Define the goodness of fit test. How is it applied in accounting?
(Solved)
Define the goodness of fit test. How is it applied in accounting?
Date posted:
February 20, 2019
.
Answers (1)
-
Given the following distribution of wages for 500 technicians in motor companies in industrial area.
(Solved)
Given the following distribution of wages for 500 technicians in motor companies in industrial area.
A technician is chosen from the above group. What is the probability that his wages are?
i) Under KSh 5,000
ii) Above KSh 6,000
iii) Between KSh 5,000 and KSh 6,000
Date posted:
February 20, 2019
.
Answers (1)
-
In connection with probability, define the following terms:
i) Compound event
ii) Mutually exclusive events
iii) Collective exhaustive events
iv) Equally likely events
v) Conditional probability
(Solved)
In connection with probability, define the following terms:
i) Compound event
ii) Mutually exclusive events
iii) Collective exhaustive events
iv) Equally likely events
v) Conditional probability
Date posted:
February 20, 2019
.
Answers (1)
-
A survey by Marketing Society here in Kenya found out the following buying habits of household air conditioners considered a luxury.
(Solved)
A survey by Marketing Society here in Kenya found out the following buying habits of household air conditioners considered a luxury.
Required:
i)Calculate the arithmetic mean, median and mode. (5 marks)
ii) Does the survey show that the luxury item is consumed by high-income earners? Show your answer by calculating appropriate measure of skewness
Date posted:
February 20, 2019
.
Answers (1)
-
Define the following terms as used in measures of dispersion:
i) Platykurtic versus leptokurtic and mesokurtic.
ii) Coefficient of skewness.
iii) Quartile deviation.
(Solved)
Define the following terms as used in measures of dispersion:
i) Platykurtic versus leptokurtic and mesokurtic.
ii) Coefficient of skewness.
iii) Quartile deviation.
Date posted:
February 20, 2019
.
Answers (1)
-
Three industries, packaging P, Bakery B, and Flour F are related with the intermediate demand matrix below.
(Solved)
Three industries, packaging P, Bakery B, and Flour F are related with the intermediate demand matrix below.
Required:
i)Determine the total output for products of industries P, B and F. (10 marks)
ii) Comment on the total output for industries.
Date posted:
February 20, 2019
.
Answers (1)
-
Write down short notes on:
i) Final demand.
ii) Technical coefficients.
iii) Closed model versus open model
(Solved)
Write down short notes on:
i) Final demand.
ii) Technical coefficients.
iii) Closed model versus open model
Date posted:
February 20, 2019
.
Answers (1)
-
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...
(Solved)
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.
iii) Lillian Wambugu will assign a fixed number of workers to the project for its entire duration and so she would like to ensure that the minimum number of workers is assigned and that the project will be completed in 14 weeks. Draw a schedule showing how the project will be completed in 14 weeks
iv) Comment on the schedule you have drawn in (iii) above.
Date posted:
February 20, 2019
.
Answers (1)
-
State four attributes of the Beta distribution which made it to be chosen as representing the distribution of activity times in project evaluation and review...
(Solved)
State four attributes of the Beta distribution which made it to be chosen as representing the distribution of activity times in project evaluation and review technique (PERT).
Date posted:
February 20, 2019
.
Answers (1)
-
Explain the four different methods or approaches for organizing and displaying project information
(Solved)
Explain the four different methods or approaches for organizing and displaying project information
Date posted:
February 20, 2019
.
Answers (1)
-
A small construction project involves the following activities:
Required:
i) Determine the shortest time and associated cost to finish this project.
ii) If a penalty of Sh.4,500 must...
(Solved)
A small construction project involves the following activities:
Required:
i) Determine the shortest time and associated cost to finish this project.
ii) If a penalty of Sh.4,500 must be charged for every day beyond 12 days, what is the most economical time for completing the project?
Date posted:
February 20, 2019
.
Answers (1)