In mathematics, a ratio illustrates the relationship between two things, often quantities, while a proportion refers to the equality of two given ratios. A ratio is generally only an expression, while a proportion can be written as an algebraic equation.
When quantities having the same units are expressed as a ratio, the result is an abstract number taken from dividing one quantity by the other. A ratio can be written in fractional form or using the ":" symbol. Quantities with dissimilar units cannot be represented as a ratio. In mathematical problems involving proportions written in fractions, a missing value can be solved if all other terms are given.
Learn MoreThe term sensitivity in epidemiology is a statistical measure on individuals who are positive, and they test positive in the tests. On the other hand, specificity refers to a statistical measure of individuals who tests negative and are truly negative.
Full Answer >A t-test is designed to test a null hypothesis by determining if two sets of data are significantly different from one another, while a chi-squared test tests the null hypothesis by finding out if there is a relationship between the two sets of data. The null hypothesis is a prediction that states there is no relationship between two variables.
Full Answer >A statistic describes a sample, while a parameter describes an entire population. A sample is a smaller subset that is representative of a larger population.
Full Answer >Qualitative data is data that is not numerical, such as colors, smells or tastes. Quantitative data is measurable with numbers, like height and weight. Objects can have both quantitative and qualitative data.
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