mb0050 research methodology 3rd sem mba smu summer2014 solved assignments
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MB0050 RESEARCH METHODOLOGY
1 How would you distinguish between a management decision problem and a management research problem? Do all decision problems require research? Explain and illustrate with examples.
Answer: Management Decision Problem vs Management Research Problem
The problem recognition process starts when the decision maker faces some difficulty or decision dilemma..
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2 How are research designs classified? What are the distinguishing features of each? Differentiate by giving appropriate examples.
Answer: Once you have established the ‘what’ of the study, i.e., the research problem, the next step is the ‘how’ of the study, which specifies the method of achieving the research objectives. In other words, this is the research design.
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3 Discuss with the help of examples the four key levels of measurement. What mathematical operations/statistical techniques are and are not permissible on data from each type of scale?
Answer: There are four types of measurement scales—nominal, ordinal, interval and ratio. We will discuss each one of them in detail. The choice of the measurement scale has implications for the statistical technique to be used for data analysis.
4 Processing of data involves editing, coding, classifying and tabulating. Explain each of these steps by taking an appropriate example.
Answer: Data editing is the process that involves detecting and correcting errors (logical inconsistencies) in data. After collection, the data is subjected to processing. Processing requires that the researcher must go over all the raw data forms and check them for errors. The significance of validation becomes more important in the following cases:
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5 Distinguish between the following:
a. Null hypothesis and Alternative hypothesis
Answer: Null hypothesis: The hypotheses that are proposed with the intent of receiving a rejection for them are called null hypotheses.
b. One tailed and two tailed tests :
c. Type I and Type II error:
d. One way and two way analysis of variance
One-way analysis of variance
e. Descriptive and inferential analysis of data
Descriptive Analysis
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6 a. What is Chi-square test of goodness of fit? What precautions are necessary while applying this test? Point out its role in business decision making.
Answer: As discussed before, the data in chi-square tests is often in terms of counts or frequencies.
b. Two research workers classified some people in income groups on the basis of sampling studies. Their results are as follow:
Investigators
Income GroupsTotal
Poor
Middle
Rich
A 160 30 10 200B 140 120 40 300Total 300 150 50 500
Show that the sampling technique of at least one research worker is defective.
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