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  2. Sampling fraction - Wikipedia

    en.wikipedia.org/wiki/Sampling_fraction

    In sampling theory, the sampling fraction is the ratio of sample size to population size or, in the context of stratified sampling, the ratio of the sample size to the size of the stratum. [1] The formula for the sampling fraction is =, where n is the sample size and N is the population size. A sampling fraction value close to 1 will occur if ...

  3. Simple random sample - Wikipedia

    en.wikipedia.org/wiki/Simple_random_sample

    An example would be if the students in the school had numbers attached to their names ranging from 0001 to 1000, and we chose a random starting point, e.g. 0533, and then picked every 10th name thereafter to give us our sample of 100 (starting over with 0003 after reaching 0993).

  4. Elementary schools in the United States - Wikipedia

    en.wikipedia.org/wiki/Elementary_schools_in_the...

    Elementary schools typically operated grades Kindergarten through 6; the junior high school, often housed in the same building as the senior high school, then covered grades 7 through 9; and the senior high school operated grades 10 through 12. At the same time, grade 9 marked the beginning of high school for the purpose of GPA calculation.

  5. List of primary education systems by country - Wikipedia

    en.wikipedia.org/wiki/List_of_primary_education...

    Kindergarten: age 5 - 6 Standard 1: age 7; Standard 2: age 8; Standard 3: age 9; Level Two Standard 4: age 10; Standard 5: age 11; Standard 6: age 12 (UPSR: Ujian Pencapaian Sekolah Rendah or Primary School Achievement Test) After completing Standard 6, students go on to secondary schools. Lower Secondary

  6. Elementary arithmetic - Wikipedia

    en.wikipedia.org/wiki/Elementary_arithmetic

    A subtraction problem such as is solved by borrowing a 10 from the tens place to add to the ones place in order to facilitate the subtraction. Subtracting 9 from 6 involves borrowing a 10 from the tens place, making the problem into +. This is indicated by crossing out the 8, writing a 7 above it, and writing a 1 above the 6.

  7. Fraction - Wikipedia

    en.wikipedia.org/wiki/Fraction

    The entire fraction may be expressed as a single composition, in which case it is hyphenated, or as a number of fractions with a numerator of one, in which case they are not. (For example, two-fifths is the fraction ⁠ 2 / 5 ⁠ and two fifths is the same fraction understood as 2 instances of ⁠ 1 / 5 ⁠.) Fractions should always be ...