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**EEC-13 Elementary Statistical Methods and Survey Techniques**

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**A. Long Answer Questions 2 x 20 = 40 marks**

1. (a) Distinguish between census and sample survey.

(b) What are the advantages and disadvantages of sample survey over the census?

(c) Prepare a short questionnaire for the collection of household data on consumption

expenditure.

2. (a) What is a standard normal variable? What are its properties?

(b) Find out the area under the standard normal curve for each of the following (use table). Sketch each one of them.

(i) between z = 0 and z = 0.78

(ii) between z = – 0.56 and z = 0

(iii) between z = – 0.43 and z = 0.78

(iv) between z = 0.44 and z = 1.50

(v) to the right of z = – 1.33.

**C. Short Answer Questions 2 x 6= 12 marks**

7) Write short notes on the following:

(a) Standard error

(b) Life Table

8) Distinguish between stratified random sampling and systematic random sampling.

**EEC-13 Elementary Statistical Methods and Survey Techniques**

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