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Statistik Exercise Chapter2

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Page 1: Statistik Exercise Chapter2

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Page 2: Statistik Exercise Chapter2

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Page 3: Statistik Exercise Chapter2

CONFIDENTIAL csrJUN 20i5[STA404

QUESNON I

a) A researcher is interested to study the effect of floods tormrds the flood vic{ims in SungaiLembing. Three thousand people reported that their home had been affected. Amongthe information.that the researcher would like to know are household income (in RM),estimated losses (in RM) due to the flood and the names of insurance companies takenby the victims. The researcherwilltrake a sample of 200 flood victims.

i) State the population and sampte of the study. :

(2 raarks)

ii) What is the sampling ftame for frris survey?(1 mark)

iii) Suggest the best sampling tecfinfiue that can be used in this study.(1 ma*)

iv) Name TWO (2) variables ftom the above study. For each variable, state iE type andmost appropriate graphicalpresentation to display the data distribution.

(4 marks)

b) The desoiptive statistics on the family annual income (in RM'000) of t households in 2cities are recorded in the following table:

ShtisticsStafistcs Citv A Citv BMean 25.72 26.01irtedian 2t.ffi 23.00Mode 23.q) 12.ffiStandard deviation 9.812 9.51Minimum 12.50 12.60Maximum 42-fi 4.10First Quartile $.24 18.45Third Quartib 35.65 32.70

Based on the above tabfe, answerthe following questions.

D lnterpret the median and mode values for City AI

iD What is the highestfamily income in Cfi B?

iii) Gornpute the variance value of ffre"farnilyincerne in City B.

(2 marks)

(1 mark)

(1 nerlq

Page 4: Statistik Exercise Chapter2

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