(1963) Sampling Techniques, Wiley, New York. Here we learn how to determine or calculate the adequate sample size or correct proportion of the population along with practical examples and a downloadable excel template. The Cochran-Mantel-Haenszel (CMH) test is used to test multiple 2 × 2 contingency tables across different values of a confounding variable. Here, for example, the value in cell L4 is computed by the worksheet formula =B24/$H5. p is the estimated proportion of an attribute that is present in the population. A histogram is an approximate representation of the distribution of numerical data. Put in simple technical terms, Cochran's Q test requires that there only be a binary response (e.g. The Z score has some basic formula … You can learn more about excel modeling from the following articles – F-Test Calculation Z Test Calculation An F-test (Snedecor and Cochran, 1983) is used to test if the variances of two populations are equal. Most of the time, p is considered by default 0.5. In statistics, a frequency distribution is a list, table (i.e. Here we provide a sample output from the UNISTAT Excel statistics add-in for data analysis. The formula is described as: Sample Size = N / (1 + N*e 2) N = population size e = margin of error Note that this is the least accurate formula and, as such, the least ideal. STAT3014/3914 Applied Statistics-Sampling Preliminary References 1.Cochran, W.G. Cochran’s formula is considered especially appropriate in situations with large populations. Respectively according to households were fully immunized.The Cochran formula allows you to calculate an ideal sample size given a desired level of precision, desired confidence level, and the estimated proportion of the attribute present in the population. That 63.6% and 88.9% of children less than 12 months and between 12 - 59 months Data wereĪnalysed using a computer software SPSS-IBM version 20. Pretested, semi structured interviewer administered questionnaire. Multistage sampling technique was employed and data were collected using a Methods: The study was a community basedĬross-sectional study involving 420 women and 743 under 5-year-old children. The immunization coverage, status and the determinants in under 5-year-old children The immunization status ofĬhildren is dependent on the dynamics of vaccination uptake which is complexĪnd involves the interplay of different associated factors. Widely despite efforts to improve the services. Immunization Status, Under 5 Year Olds, Determinants, Owerri, Nigeriaīackground: Immunization coverage in different parts of the country varies 2nd Edition, John Wiley and Sons Inc., New York.Īssessment of Immunization Status, Coverage and Determinants among under 5-Year-Old Children in Owerri, Imo State, NigeriaĪUTHORS: Chukwuma B.

Cochran sampling formula