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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 ...
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 ...
critical t score
Critical t score is the distance between the boundaries of the "unlikely" area for a t distribution and the mean of that distribution expressed in number of standard deviations; for example, if we assume a sampling distribution is t-shaped, the ...
zscore()
The function zscore() will standardize a variable by converting all of its values to z-scores (i.e., the number of standard deviations the score is above or below the mean). Example 1: Using the zscore() function alone will produce a list of z-scores ...
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 ...