BSc Statistics SEM I 2019 2020 Nov 2020 STATISTICS PAPER I Question Paper - Mumbai University | munotes

Questions asked in this paper

1. Q1 (a) Correct the following if necessary. Justify each ( correct or wrong) statement. 10 marks
   • 1) Qualitative data cannot be represented on ordinal scale
   • 2) If Yule’s coefficient is +1 then attributes A & B are independent. 2
   • 3) To draw a pie-chart the total of the values of the variables should be 100. 2
   • 4) For two positive numbers, AM < GM < HM. 2
   • 5) Two sets of values are compared with respect to variability on the basis of absolute measure of dispersion. [02]
2. Q1 Answer in one sentence. 10 marks
   • 1) Define the term skewness. 2
   • 2) State any one property of S.D. 2
   • 3) State empirical relation between median & mode 2
   • 4) Give any one advantage of diagrammatic representation. 2
   • 5) Name the ways of selecting a Simple Random Sampling. 2
3. Q2 Attempt any two. 20 marks
   • 1) Discuss(i) Nominal (ii) Ordinal (iii) interval and ratio scales giving one example of each. [10]
   • 2) (i) State characteristics of good sample 4 (ii) Distinguish between qualitative and quantitative data
   • (iii) What is secondary data? Which are the chief sources of secondary data. 10
   • 3) For the following data on 3 attributes find all the remaining class frequencies ) = 25, ls the data consistent? [10]
   • 4) The following is a set of prices of company XYZ's shares on 50 consecutive days Prepare a frequency table for the above data using class intervals 20-24, 25-29,
4. Q3 Attempt any two. 20 marks
   • 1) With appropriate illustration, describe:
   • 2) Arithmetic mean. Explain the effect of change of origin & scale on A.M. 10
   • 3) Calculate G.M & H.M for the following distribution. {10]
   • 4) Median &Mode for the following frequency distribution data:
5. Q4 Attempt any two 20 marks
   • 1) State different absolute and relative measures of dispersion. 10
   • 2) State the different measures of kurtosis and their interpretations. 10
   • 2) The prices of a particular commodity during last five years in two different cities are Which city has more stable prices ? Why ?
   • 3) Find the four moments about the mean for the following distribution: Attempt any four. [20] 10
   • 1) Discuss the different methods of collecting primary data
   • 2) What are the objectives of tabulations?
   • 3) Write a short note on SRSWR and SRSWOR
   • 4) State merits & demerits of median. 5
   • 5) Explain the effect of change of origin & scale on S.D. 5
   • 6) Describe various measures of skewness. 5
   • 7) Define sampling and types of sampling. 5

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