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CA Foundation · Quantitative Aptitude · Statistical Description of Data

In a census enquiry compared with a sample enquiry, which statement is correct?

A census covers every unit of the population and gives accurate, complete results, especially for small populations. It is costly and time-consuming for large ones, and sampling is used when testing destroys items, so the other statements are incorrect.

  1. AA census is cheaper and faster than a sample enquiry for a large population
  2. BA census covers every unit of the population and gives more accurate results for small populationsCorrect
  3. CA sample enquiry always covers every unit of the population
  4. DA sample enquiry cannot be used where testing destroys the item

Explanation

A census studies every unit of the population, so for a small population it gives more accurate and complete information. It is costly and slow for large populations. Sampling is preferred where testing destroys the item, so the last option is wrong.

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