IGNOU MCO-03 June 2015 Previous Year Question Paper

Q1.Differentiate between probability and non-probability sampling methods with their advantages and limitations. Explain how stratified random sampling is different from cluster sampling.

Q2.The average and standard deviation of stock prices in the last one year are given below : 5+5+10 Stock-A Stock-B Average price (Z) 50 100 Standard deviation (Z) 5 5 Calculate coefficient of variance for stock - A and Stock -B. Draw your inferences with respect to Riskiness of each stock.

Q3.A sales manager wants to know relationship between expenditure on advertisements and the value of sales of different products. Using the monthly data for 10 months, he employed Karl Pearson's formula and obtained the following Correlation coefficients. Correlation Coefficient Product - A 0.65 Product - B 0.10 Product - C — 0.25 Product - D — 0.85

(a) Draw your inferences. 10

(b) What is time - series ? Discuss its various 10 components.

Q4.(a) What do you understand by the terms null 10 hypothesis and alternate hypothesis ? Discuss with suitable examples.

(b) Discuss on the types of errors we commit 10 while testing hypothesis.

Q5.(a) What is chi-square test ? Give its formula 10 and discuss the applications of chi-square test.

(b) Discuss on the conditions for applying 10 chi-square test.

Q6.What is Bayes' theorem ? Discuss its use in 20 probability with examples.

Q7.What is a research report ? What are the different 20 ways in which results of a research enquiry can be presented ? Give examples.

Q8.Write notes on any two of the following : 10+10

(a) Characteristics of Normal Distribution.

(b) Case method of research.

(c) Precautions to be taken while using secondary data.

(d) Nominal and Ordinal scales of measurement. MCO-03 3 _71.1*.311.-03 uvrei *II ch Tvt wry Rita tril-gr

Q12.fEruA * (k 410 -11-Fti T1 3111Tff teN .P.TT TIN (standard deviation) r-i4-irrinsici t : 5+5+10 311R7 1:FT (Z) 50 100 31771 roM1-1 (t") 5 5 t-dIch - Ac. 1T 4ict) - B f f -dWur launch (Coefficient of Variance) Wr-A-R5R-?.11) 71§K ITT TIWV 3Tcr4 31>iN (inferences) cic-i I

Q13.Ugh rc1sh1 3TiT4 fd-41-79. ITT 04442.1.1-fq.51-9 f4* tc-04 -4 #4.4 TU chtli t I [1:1 -flt .W1 dqi)if cbt F atia cniri th749 . C1+111T 34 Fii-iFoRAct TIT 14-4tT 'iluTE (Correlation Coefficients) 7M. rch k : TM. It4tT - A 0.65 3-0Trq - B 0.10 dr4K - C -0.25 7-oTrq - D - 0.85

(a) aicA 3-111-111 kinferences) T I 10

(b) chlkich qtM .T (Time - Series) 14 EfT t ? 10 Trk fafiTR otutseir wir--A-R

Q14.(a) 4fichz411 -TT (alternate) Lirtcbc-4411 10 3Trcr q:Err Trgr-g? drcld 3qT6TO Tr1-0 ciitstir

(b) -9tkTuT chta 111:171 R . Falq SOW 10 39 F--476 cf,Aa t d•cm

Q15.(a) 1T TT' ITT t ? Pl ."*7 tA (formula) 10 WffiF 72IT .4)I V ITE oliorA tr4fff f-dkqff

(b) chi TRIvir (111.4

Q17.4F ft A 7!:Iran:14 t? -R-- arf:ftiia . Ai-cf * 20 4ikurn4 -).-9--E0 ci)( .-1--rqfai-- fqfiptiwt? dqi(uil Trtff °WSW -WrEATI I

Q18.f14-1Forigcr -4 A fc:1 . t -crt Fd,-(41-urii t -N7 : 10+10

(a) fl14-11-4{ fddtur rcitic11(1

(b) 31-0%.117 4>t4 "NfN

(c) fgal-zr Al:WI 371'11T rntd ti4-11 WI '1I alc i) Tr1qqr1-9-41

(d) 4-114-r * 7P4 ITN. (nominal) MIT Tli 7114 ,41 (ordinal)