What is Simple Random Sample?

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A simple random sample is a subset of a statistical population in which each member of the subset has an equal probability of being chosen. A simple random sample is meant to be an unbiased representation of a group.

Definition

Simple random sampling refers to a subset of a statistical population where each member has an equal probability of being chosen. It implies an unbiased representative sampling of a group.

Origin

The concept of simple random sampling originates from the foundational theories of statistics, dating back to the late 19th and early 20th centuries when statisticians began systematically studying how to draw samples from populations for inference. As statistics evolved, simple random sampling became a standard sampling method.

Categories and Features

There are two main forms of simple random sampling: sampling with replacement and sampling without replacement. Sampling with replacement means that after a sample is drawn, it is returned to the population and can be selected again in subsequent draws; sampling without replacement means once a sample is selected, it is not returned to the population. The key feature of simple random sampling is that each sample unit has an equal chance of being selected, ensuring the sample's representativeness and unbiasedness.

Case Studies

Case Study 1: In a national survey, researchers used simple random sampling to select 1,000 participants from the entire population, ensuring that each individual had an equal chance of being chosen, thus obtaining a representative survey result. Case Study 2: A company conducting an employee satisfaction survey used simple random sampling to randomly select 200 employees from all staff to participate in the questionnaire, ensuring the fairness and accuracy of the survey results.

Common Issues

Common issues include insufficient sample size leading to lack of representativeness and the practical difficulty of achieving complete randomization. Solutions include increasing the sample size and using computer-generated random numbers to enhance the degree of randomization.

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Lisbon Treaty

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Labor Intensive

The term "labor-intensive" refers to a process or industry that requires a large amount of labor to produce its goods or services. The degree of labor intensity is typically measured in proportion to the amount of capital required to produce the goods or services: the higher the proportion of labor costs required, the more labor-intensive the business.

Labor Intensive

The term "labor-intensive" refers to a process or industry that requires a large amount of labor to produce its goods or services. The degree of labor intensity is typically measured in proportion to the amount of capital required to produce the goods or services: the higher the proportion of labor costs required, the more labor-intensive the business.

Fast-Moving Consumer Goods

Fast-moving consumer goods (FMCGs) are products that sell quickly at relatively low cost. FMCGs have a short shelf life because of high consumer demand (e.g., soft drinks and confections) or because they are perishable (e.g., meat, dairy products, and baked goods).They are bought often, consumed rapidly, priced low, and sold in large quantities. They also have a high turnover on store shelves. The largest FMCG companies by revenue are among the best known, such as Nestle SA. (NSRGY) ($99.32 billion in 2023 earnings) and PepsiCo Inc. (PEP) ($91.47 billion). From the 1980s up to the early 2010s, the FMCG sector was a paradigm of stable and impressive growth; annual revenue was consistently around 9% in the first decade of this century, with returns on invested capital (ROIC) at 22%.

Fast-Moving Consumer Goods

Fast-moving consumer goods (FMCGs) are products that sell quickly at relatively low cost. FMCGs have a short shelf life because of high consumer demand (e.g., soft drinks and confections) or because they are perishable (e.g., meat, dairy products, and baked goods).They are bought often, consumed rapidly, priced low, and sold in large quantities. They also have a high turnover on store shelves. The largest FMCG companies by revenue are among the best known, such as Nestle SA. (NSRGY) ($99.32 billion in 2023 earnings) and PepsiCo Inc. (PEP) ($91.47 billion). From the 1980s up to the early 2010s, the FMCG sector was a paradigm of stable and impressive growth; annual revenue was consistently around 9% in the first decade of this century, with returns on invested capital (ROIC) at 22%.

Negotiable Instruments

A negotiable instrument is a signed document that promises a payment to a specified person or assignee. In other words, it is a formalized type of IOU: A transferable, signed document that promises to pay the bearer a sum of money at a future date or on-demand.Common examples of negotiable instruments include personal checks, cashier's checks, money orders, certificates of deposit (CDs), promissory notes, and traveler's checks. The person receiving the payment, known as the payee, must be named or otherwise indicated on the instrument. Because they are transferable and assignable, some negotiable instruments may trade on a secondary market.

Negotiable Instruments

A negotiable instrument is a signed document that promises a payment to a specified person or assignee. In other words, it is a formalized type of IOU: A transferable, signed document that promises to pay the bearer a sum of money at a future date or on-demand.Common examples of negotiable instruments include personal checks, cashier's checks, money orders, certificates of deposit (CDs), promissory notes, and traveler's checks. The person receiving the payment, known as the payee, must be named or otherwise indicated on the instrument. Because they are transferable and assignable, some negotiable instruments may trade on a secondary market.

Renewable Resource

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Renewable Resource

A renewable resource is a resource that can be replenished naturally over time. As a result, it is sustainable despite its consumption by humankind.Renewable resources for the production of energy are considered especially important for their potential to replace non-renewable, or finite, resources. Additionally, renewable resources can offer cleaner energy solutions than those provided by non-renewable resources such as coal and fossil fuels.Examples of renewable resources include the sun, wind, water, the earth's heat (geothermal), and biomass.

Feasibility Study

A feasibility study is a detailed analysis that considers all of the critical aspects of a proposed project in order to determine the likelihood of it succeeding.Success in business may be defined primarily by return on investment, meaning that the project will generate enough profit to justify the investment. However, many other important factors may be identified on the plus or minus side, such as community reaction and environmental impact.Although feasibility studies can help project managers determine the risk and return of pursuing a plan of action, several steps should be considered before moving forward.

Feasibility Study

A feasibility study is a detailed analysis that considers all of the critical aspects of a proposed project in order to determine the likelihood of it succeeding.Success in business may be defined primarily by return on investment, meaning that the project will generate enough profit to justify the investment. However, many other important factors may be identified on the plus or minus side, such as community reaction and environmental impact.Although feasibility studies can help project managers determine the risk and return of pursuing a plan of action, several steps should be considered before moving forward.