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The z Score utility model transforms the distribution of pixel values into a standard normal distribution (z-score value). By this normalization the images of different individuals become more comparable.
For more information on z-score, check this article:
http://en.wikipedia.org/wiki/Standard_score
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Calculate the z-score for a test score of 87 if the mean test score is 81.1 and standrd deviation is 11.06?
z score = (test score - mean score)/SD z score = (87-81.1)/11.06z score = 5.9/11.06z score = .533You can use a z-score chart to calculate the probability from there.
What is the value of a 'z' score of 0?
A z-score of 0 means the value is the mean.
What is the z-score for 1.87?
The z-score must be 1.87: the probability cannot have that value!
How do you find a z-score?
Z Score is (x-mu)/sigma. The Z-Score allows you to go to a standard normal distribution chart and to determine probabilities or numerical values.
What is the formula to convert a z score into a percentile rank?
You need to look up z-score tables.
