Category Data Management & Operational Research

Portfolio Management – What are the mean returns and risk of a portfolio if the investment manager invests

Consider the following information about three assets:
Stock                                 Mean Return                                 Standard Deviation
Moose                                   10.00%                                               5.20%
Gnu                                        8.00%                                                 2.70%
Wildebeest                           12.00%                                               6.50%
a) What are the mean returns and risk of a portfolio if the investment manager invests in:
i. 25% in Moose and 75% in Gnu if the correlation between Moose & Gnu is 0.2?
ii...

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Information Systems – OES LTD is a manufacturer and supplier of office equipment for business

Office Equipment Suppliers (OES)

OES LTD is a manufacturer and supplier of office equipment for business. Originally, a family owned business, is now employing over 100 employees with three owners: Joan Smith (Head of Accounts), Peter Saunders (Sales and Marketing) and Raj Kang (Warehousing and Manufacture), who all have an equal share. The business has been established since the 1960s and has a good reputation with its clientele. However, over the past few years the economic downturn has affected the business adversely.

Recently, OES had secured a major contract with Reus LTD who has 50 offices in the USA. OES have been tasked with the responsibility of supplying all office furniture...

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Data Management & Operational Research: A clinic has recorded the following numbers of patients’ visits

Question 1

A clinic has recorded the following numbers of patients’ visits. They have observed that there is no apparent seasonal pattern in the numbers of visits. The following data of past history are available.

a) Apply the Naïve method, which uses the most recent available observation as a forecast for the next period, to generate the forecast for Quarter 3, 2010.
Determine the forecast accuracy of the method for this time series, using the Mean Squared Error. Assuming the first 5 periods to be the warm-up sample, determine the forecast accuracy for the periods 6 to 10. Present your results in an appropriate table form.

b) Generate forecast for Quarter 3, 2010 using the Single Exponential Smoothing method with α = 0.2. Assume that the forecast for Quarter 1, Year 2008 is 28...

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