normal distribution

normal distribution

Normal distribution is unimodal, symmetrical, mostly scores clumped in the center, few scores far away from center; also known as bell-shaped distribution; this is a frequently used probability distribution; the shape of the normal distribution follows the empirical rule; also called z distribution.

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    • t distribution

      T distribution is a probability distribution that is very similar but slightly more variable than the normal distribution. The t distribution has a slightly different shape depending on the degrees of freedom used to estimate . And for very large ...

    • z distribution

      Z distribution is also called normal distribution or bell-shaped distribution; unimodal, symmetrical, most scores clumped in the center, few scores far away from center; this is a frequently used probability distribution; the shape of the z ...

    • shape of a distribution

      The overall shape of the distribution (e.g., uniform, symmetrical, skewed, unimodal, bimodal, bell-shaped, normal).

    • bell-shaped distribution

      Bell-shaped distribution is unimodal, symmetrical, mostly scores clumped in the center, few scores far away from center; also known as normal distribution.

    • critical z score

      Critical z score is the distance between the boundaries of the "unlikely" area for a normal distribution and the mean of that distribution expressed in number of standard deviations; for example, if we assume a sampling distribution is normal, the ...