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CA Foundation Statistical Representation of Data and Sampling — practice questions

Explore 69 free Statistical Representation of Data and Sampling questions in CA Foundation Quantitative Aptitude. Open each question or exercise to read its content, reference answers and available explanation.

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Statistical Representation of Data and Sampling questions and exercises with answers

Showing questions 1–30 of 69.

A subset drawn from a population to estimate its traits is called a what?Read the answer and worked solution →Compared with a census, sampling usually offers which advantage?Read the answer and worked solution →Acceptance sampling is used to decide whether a production lot does what?Read the answer and worked solution →In 1786, Laplace used a sample and a ratio estimator to estimate the population of which country?Read the answer and worked solution →The 1936 Literary Digest poll had two million replies but failed. Why?Read the answer and worked solution →The most straightforward type of sampling frame is what?Read the answer and worked solution →In a probability sample, every unit has which property?Read the answer and worked solution →A design where every element has the same selection probability is known as what?Read the answer and worked solution →Why are equal probability designs called self-weighting?Read the answer and worked solution →Which of these is a probability sampling method?Read the answer and worked solution →What does nonprobability sampling fail to allow?Read the answer and worked solution →In a simple random sample, how are all subsets treated?Read the answer and worked solution →A weakness of simple random sampling is that a sample may do what?Read the answer and worked solution →A firm numbers 1,200 files and wants 40 by systematic sampling. What is the interval k?Read the answer and worked solution →Every how-manieth voucher must an auditor pick from 2,500 to get 50 by systematic sampling?Read the answer and worked solution →In systematic sampling, how should the starting point be chosen?Read the answer and worked solution →Systematic sampling is especially vulnerable to what in the list?Read the answer and worked solution →Which other name is given to systematic sampling?Read the answer and worked solution →In stratified sampling, the distinct categories of the population are called what?Read the answer and worked solution →The ratio of the sample size to the population size is called what?Read the answer and worked solution →A sample of 150 is drawn from a population of 3,000. What is the sampling fraction?Read the answer and worked solution →When is stratified sampling most effective regarding variability within strata?Read the answer and worked solution →Stratified sampling works best when the stratifying variables are what?Read the answer and worked solution →A population has 600 men and 400 women. A proportional stratified sample of 100 has how many men?Read the answer and worked solution →Strata hold 2,000, 3,000 and 5,000 units. A proportional sample of 200 takes how many from the 3,000 stratum?Read the answer and worked solution →Stratification introduced after the sampling phase is called what?Read the answer and worked solution →Choice-based sampling (oversampling) is done so that what happens?Read the answer and worked solution →In PPS sampling, an element's selection probability is set to be what?Read the answer and worked solution →A hotel guest-night survey using PPS would use which size measure?Read the answer and worked solution →Six schools total 1,500 students. PPS counts through students to pick 3 schools. What is the interval?Read the answer and worked solution →

Worked practice questions

A subset drawn from a population to estimate its traits is called a what?

  1. Stratum
  2. Census
  3. Frame
  4. Sample
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Correct answer: D. Sample

A subset chosen from a statistical population to estimate characteristics of the whole is a sample.

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Compared with a census, sampling usually offers which advantage?

  1. No sampling error at all
  2. Exact population totals
  3. A list of every unit
  4. Lower cost and faster data
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Correct answer: D. Lower cost and faster data

Measuring only a subset costs less and finishes sooner than recording every member of the population.

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Acceptance sampling is used to decide whether a production lot does what?

  1. Is priced correctly
  2. Has enough buyers
  3. Meets specifications
  4. Was made on schedule
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Correct answer: C. Meets specifications

Inspecting a sample from a lot lets a manufacturer judge whether the whole lot meets its specifications.

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