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  2. Closed-ended question - Wikipedia

    en.wikipedia.org/wiki/Closed-ended_question

    A closed-ended question is any question for which a researcher provides research participants with options from which to choose a response. [1] Closed-ended questions are sometimes phrased as a statement that requires a response. A closed-ended question contrasts with an open-ended question, which cannot easily be answered with specific ...

  3. Linear regression - Wikipedia

    en.wikipedia.org/wiki/Linear_regression

    The link function is often related to the distribution of the response, and in particular it typically has the effect of transforming between the (,) range of the linear predictor and the range of the response variable. Some common examples of GLMs are: Poisson regression for count data.

  4. Regression analysis - Wikipedia

    en.wikipedia.org/wiki/Regression_analysis

    For example, a researcher is building a linear regression model using a dataset that contains 1000 patients (). If the researcher decides that five observations are needed to precisely define a straight line ( m {\displaystyle m} ), then the maximum number of independent variables ( n {\displaystyle n} ) the model can support is 4, because

  5. Range (statistics) - Wikipedia

    en.wikipedia.org/wiki/Range_(statistics)

    In descriptive statistics, the range of a set of data is size of the narrowest interval which contains all the data. It is calculated as the difference between the largest and smallest values (also known as the sample maximum and minimum). [1] It is expressed in the same units as the data. The range provides an indication of statistical ...

  6. Coefficient of determination - Wikipedia

    en.wikipedia.org/wiki/Coefficient_of_determination

    Ordinary least squares regression of Okun's law.Since the regression line does not miss any of the points by very much, the R 2 of the regression is relatively high.. In statistics, the coefficient of determination, denoted R 2 or r 2 and pronounced "R squared", is the proportion of the variation in the dependent variable that is predictable from the independent variable(s).

  7. Interval (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Interval_(mathematics)

    The diameter may be called the length, width, measure, range, or size of the interval. The size of unbounded intervals is usually defined as +∞, and the size of the empty interval may be defined as 0 (or left undefined). The centre of a bounded interval with endpoints a and b is (a + b)/2, and its radius is the half-length | a − b |/2 ...

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  9. Response bias - Wikipedia

    en.wikipedia.org/wiki/Response_bias

    [2] Neutral questions: The goal of this strategy is to use questions that are rated as neutral by a wide range of participants so that socially desirable responding does not apply. [2] Randomized response technique: This technique allows participants to answer a question that is randomly selected from a set of questions. The researcher in this ...