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  2. List of price index formulas - Wikipedia

    en.wikipedia.org/wiki/List_of_price_index_formulas

    The Marshall-Edgeworth index, credited to Marshall (1887) and Edgeworth (1925), [11] is a weighted relative of current period to base period sets of prices. This index uses the arithmetic average of the current and based period quantities for weighting. It is considered a pseudo-superlative formula and is symmetric. [12]

  3. List of language proficiency tests - Wikipedia

    en.wikipedia.org/wiki/List_of_language...

    The following is a non-exhaustive list of standardized tests that assess a person's language proficiency of a foreign/secondary language. Various types of such exams exist per many languages—some are organized at an international level even through national authoritative organizations, while others simply for specific limited business or study orientation.

  4. EF English Proficiency Index - Wikipedia

    en.wikipedia.org/wiki/EF_English_Proficiency_Index

    The EF English Proficiency Index (EF EPI) attempts to rank countries by the equity of English language skills amongst those adults who took the EF test. [2] It is the product of EF Education First, an international education company, and draws its conclusions from data collected via English tests available for free over the internet.

  5. Index (economics) - Wikipedia

    en.wikipedia.org/wiki/Index_(economics)

    Index numbers are used especially to compare business activity, the cost of living, and employment. They enable economists to reduce unwieldy business data into easily understood terms. In contrast to a cost-of-living index based on the true but unknown utility function, a superlative index number is an index number that can be calculated. [1]

  6. SPEAK (test) - Wikipedia

    en.wikipedia.org/wiki/SPEAK_(test)

    The Speaking Proficiency English Assessment Kit (SPEAK) is a test developed by the Educational Testing Service (ETS) to measure a non-native speaker's proficiency in spoken English. It is usually taken as a professional certification , especially by graduate teaching assistants and medical professionals in the American college and university ...

  7. Törnqvist index - Wikipedia

    en.wikipedia.org/wiki/Törnqvist_index

    For example, a Törnqvist index summarizing labor input may weigh the growth rate of the hours of each group of workers by the share of labor compensation they receive. [7] The Törnqvist index is a superlative index, meaning it can approximate any smooth production or cost function. "Smooth" here means that small changes in relative prices for ...

  8. General Tests of English Language Proficiency - Wikipedia

    en.wikipedia.org/wiki/General_Tests_of_English...

    General Tests of English Language Proficiency; Acronym: G-TELP: Type: Paper-based standardized test. Administrator: International Testing Services Center: Skills tested: Reading, listening, speaking and writing of the English language. Purpose: To assess the English language proficiency of non-native English speakers. Year started: 1985; 40 ...

  9. International Test of English Proficiency - Wikipedia

    en.wikipedia.org/wiki/International_Test_of...

    The exam is designed to put the test-taker at ease using a conversational, friendly context. This exam is also used in academic settings. [12] iTEP Hospitality measures the English skills necessary to work at restaurants, hotels, resorts, and cruise lines that serve English speakers. The test lasts 30 minutes and evaluates speaking and listening.