Examlex
Based on the code above,list the number and name of all customers that are either represented by sales rep 30 or that currently have orders on file,or both.
Between
Used to describe a relationship or comparison involving two or more variables or groups.
Z-scores
A measure of how many standard deviations an element is from the mean. It is used in statistics to identify how unusual or typical a data point is.
Standard Normal Distribution
A normal distribution with a mean of zero and a standard deviation of one, used as a basis for comparing other normal distributions.
Less Than
A mathematical relation indicating that one quantity is smaller than another.
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