Suppose you have a set of scores that are normally distributed with a mean equal to 90. The standard deviation for the scores is 15. If a score in the distribution is equal to 75, then the z for this score is
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The z-score is a measure of how many standard deviations an element is from the mean. It is calculated using the formula: \[ z = \frac{(X - \mu)}{\sigma} \] where \(X\) is the value from the distribution, \(\mu\) is the mean of the distribution, and \(\sigma\) Show more…
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