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SMU MBA Assignments 1st Sem MB0040 – Statistics for Management (Set 1 and 2)

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					                                                                Fall 2011- August drive


                              MBA SEMESTER 1

         MB0040 – STATISTICS FOR MANAGEMENT- 4 Credits

                               (Book ID: B1129)

                       Assignment Set- 1 (60 Marks)

  Note: Each question carries 10 Marks. Answer all the questions



   1. (a) ‘Statistics is the backbone of decision-making’. Comment. [ 5 marks]

      (b) Give plural meaning of the word Statistics?                      [ 5 marks]
Refer http://smumbaassignmentssolved.blogspot.com/ for completely solved
assignments.



   2. a. In a bivariate data on ‘x’ and ‘y’, variance of ‘x’ = 49, variance of ‘y’ =
      9 and covariance (x,y) = -17.5. Find coefficient of correlation between
      ‘x’ and ‘y’.                                             [ 5 marks]
      b. Enumerate the factors which should be kept in mind for proper
      planning.                                                [ 5 marks]

   3. The percentage sugar content of Tobacco in two samples was represented
      in table 11.11. Test whether their population variances are same.
                                                               [ 10 marks]

        Table 1. Percentage sugar content of Tobacco in two samples
               Sample A        2.4    2.7    2.6 2.1     2.5
               Sample B        2.7    3.0    2.8 3.1     2.2    3.6


   4. a. Explain the characteristics of business forecasting. [ 5 marks]
      b. Differentiate between prediction, projection and forecasting.
                                                              [ 5 marks]
   5. What are the components of time series? Bring out the significance of
      moving average in analysing a time series and point out its limitations.
                                                                 [ 10 marks]
                                                               Fall 2011- August drive


   6. List down various measures of central tendency and explain the
      difference between them?                [ 5 marks]
      b. What is a confidence interval, and why it is useful? What is a
      confidence level?                                  [ 5 marks]




                              MBA SEMESTER 1

         MB0040 – STATISTICS FOR MANAGEMENT- 4 Credits

                               (Book ID: B1129)

                       Assignment Set- 2 (60 Marks)

  Note: Each question carries 10 Marks. Answer all the questions

   1. (a) What are the characteristics of a good measure of central tendency? [
      5 marks]
      (b) What are the uses of averages?         [ 5 marks]
Refer http://smumbaassignmentssolved.blogspot.com/ for completely solved
assignments.



   2. Calculate the 3 yearly and 5 yearly averages of the data in table below.
                                                          [ 10 marks]

                   Table 1: Production data from 1988 to 1997
        Year        1988 198 199 199 1992 1993 1994 1995 1996 199
                         9 0 1                                7
        Productio 15     18 16 22 19          24    20    28   22      30
        n (in Lakh
        ton)


   3. (a) What is meant by secular trend? Discuss any two methods of isolating
      trend values in a time series.                            [ 5 Marks]
   (b)What is seasonal variation of a time series? Describe the various methods
   you know to evaluate it and examine their relative merits.   [ 5 marks]
                                                              Fall 2011- August drive


4. The probability that a contractor will get an electrical job is 0.8, he will
   get a plumbing job is 0.6 and he will get both 0.48. What is the
   probability that he get at least one? Is the probabilities of getting
   electrical and plumbing job are independent?        [ 10 marks]

5. (a) Discuss the errors that arise in statistical survey.      [ 5 marks]

(b) What is quota sampling and when do we use it?                 [ 5 marks]

6. (a) Why do we use a chi-square test?                        [ 5 marks]
   (b) Why do we use analysis of variance?                      [ 5 marks]

				
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