Explain the concept of telescopic effect

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The answer should be preferably with pictures and sketches.

a) Describe what measures can be taken before, during and after data collection to reduce the effects of dropouts in a sample survey.

b) Which of the following selection techniques are random selections: (1) snowball selection, (2) systematic selection, (3) stratified selection, (4 two-step selection, and (5) convenience selection

c) Explain the concept of telescopic effect and what advantages and disadvantages it entails in a sample survey.

d) Explain the concepts of over- and under-coverage and what advantages and disadvantages they bring with them in a sample survey.

Reference no: EM132843955

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