sampling

Thân thiện

A scientist takes a sampling of water from the river.

Definition

Noun: 1. The process or technique of taking a sample: The act of selecting a part of something to represent the whole, especially for testing, analysis, or study. 2. A small part or quantity intended to show what the whole is like: The selected items or data points themselves, considered as a group. 3. (Signal Processing) The measurement of a signal's amplitude at regular intervals: The process of converting a continuous analog signal into a series of discrete digital values by measuring its strength at specific points in time. 4. (Statistics) The selection of a subset of individuals from a population: The methodological process of choosing a representative group from a larger population to estimate characteristics of the whole population.

Usage and Examples

• General Use (Taking a Sample):
  • The chef offered sampling of the new soup to customers.
  • Quality control involves the sampling of products from the assembly line.
• Statistics and Research:
  • Random sampling ensures every member of the population has an equal chance of being selected.
  • The accuracy of the survey depends heavily on the sampling method used.
• Signal Processing and Music:
  • The audio quality is determined by the sampling rate, measured in kilohertz.
  • The producer used sampling from a vintage record to create the song's beat.

Advanced Usage

• "Sampling distribution" (Statistics): The probability distribution of a statistic obtained from a large number of samples drawn from a specific population.
• "Sampling error": The difference between the results obtained from a sample and the results that would be obtained from the entire population, due to the fact that only a part of the population was surveyed.
• "Convenience sampling": A non-probability sampling technique where subjects are selected because of their convenient accessibility and proximity to the researcher.

Variants and Related Words

• Sample (n/v): The selected part itself (n); to take a sample (v).
  • The lab will sample the water for contaminants.
• Sampler (n): A person or device that takes samples; also, a collection of samples or a digital device used in music.
• Resampling (n): The process of sampling again or applying statistical techniques to an existing sample dataset.

Synonyms

• Selection: The action of carefully choosing something.
• Excerpting: Taking a short extract from a text or piece of music.
• Spot-checking: Making a quick, random examination or test.

Related Phrases and Idioms

• "To be a representative sample": To accurately reflect the characteristics of the larger group.
  • We need to ensure our survey group is a representative sample of the city's population.
• "Sampling bias": A bias in which a sample is collected in such a way that some members of the intended population are less likely to be included than others, leading to skewed results.

Học thuật

Noun

1. measurement at regular intervals of the amplitude of a varying waveform (in order to convert it to digital form)
2. items selected at random from a population and used to test hypotheses about the population
3. (statistics) the selection of a suitable sample for study

Từ đồng nghĩa

• sample distribution
• sample