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Code: 17E00105
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MBA & MBA (Finance) I Semester Regular & Supplementary Examinations December/January 2018/19
STATISTICS FOR MANAGERS
(For students admitted in 2017 & 2018 only)
Time: 3 hours
Max. Marks: 60
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SECTION -A
(Answer the following: (05 X 10 = 50 Marks)
1. Discuss the application of dispersion measures for business decision making.
OR
2. A security analyst studied hundred companies and obtained the following data for the year 1997:
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| Dividend declared (%) | 0-8 | 8-16 | 16-24 | 24-32 | 32-40 |
|---|---|---|---|---|---|
| Number of companies | 15 | 30 | 40 | 10 | 5 |
Calculate the standard deviation of the dividend declared.
3. Obtain the lines of regression from the following data:
x: 16 12 10 14 18
y: 19 11 15 18 17
OR
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4. Define regression. Explain its properties and applications.
5. What are the properties of Poisson distribution?
OR
6. Potassium blood levels in healthy humans are normally distributed with a mean of 17.0 mg/100 ml, and standard deviation of 1.0 mg/100 ml. Elevated levels of potassium indicate an electrolyte balance problem, caused by Addison's disease. However, a test for potassium level should not cause too many “false positives”. What level of potassium should we use so that only 2.5% of healthy individuals are classified as "abnormally high"?
7. Explain the steps involved in testing the hypothesis. What are the possible errors that may occur while testing the hypothesis?
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OR
8. Explain the different types of ANOVA. What are the steps involved in carrying out ANOVA?
9. How chi-square is calculated? Explain any two of its applications.
OR
10. Explain the different types of non parametric tests.
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SECTION -B
Case Study:
(Compulsory question, 01 X 10 = 10 Marks)
11. The following are the details of sales effected by three sales persons in three door-to-door campaigns.
Sales in door – to – door campaign
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| Sales person | ||||
|---|---|---|---|---|
| A | 8 | 9 | 5 | 10 |
| B | 7 | 6 | 6 | 9 |
| C | 6 | 6 | 7 | 5 |
Construct an ANOVA table and find out whether there is any significant difference in the performance of the sales persons.
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