z distribution

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 distribution follows the empirical rule.

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    • 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 ...

    • 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 ...

    • z score

      A z score represents the number of standard deviations a score is above (if positive) or below (if negative) the mean.

    • distribution

      Distribution is the pattern of variation in a variable or set of variables.

    • xpnorm()

      The xpnorm() function will generate the probability and z-score for a value (X) based on the mathematical function for a normal distribution. It can do this with just three pieces of information: the border you are interested in, and the mean and ...