Slovin's formula is written as n = N/(1+Ne^2). In the formula, n = the number of samples needed, N = total population and e = error tolerance.
Know MoreSlovin's formula is used in statistical analysis as a tool to determine the sample size of a population that must be taken for a specific study. This formula is only used when the sample size is unknown; for example, since things like IQ scores tend to follow a predictable distribution pattern, it is easy to find an appropriate sample size for studying this topic. Using the formula, statisticians can come up with a reliable sample size to study a given population without having to study the entire population individually.
Learn more in StatisticsThe Chi square statistic is the sum of the squared differences between the observed and expected frequencies divided by the expected frequencies. Chi square = Sum [(observed frequency - expected frequency)^2/expected frequency)]
Full Answer >The margin of error formula is an equation that measures the range of values above and below the sample statistic. It is defined by taking the critical value and multiplying it by the standard error of the statistic.
Full Answer >Sample mean is calculated by finding the sum of all terms in the selected sample and dividing this figure by the total number of terms. This formula is used to compute the average of the data collected.
Full Answer >In medicine, odds ratio formula is the measure of odds of association between exposures divided by the odds of the outcomes (odds ratio = (ad/bc)). The formula is used to measure the strength of absence or presence of a property in a given population.
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