[Solved] A ________ offering consists of two parts: a naked solution and discretionary options. A) differentiated market B) flexible market C) rigid market D) vertical market E) horizontal market Residual Standard Deviation: A measure of the standard deviation of residuals in regression analysis, indicating the typical distance between observed and predicted values. Proficiency Test: An evaluation designed to assess an individual's competence or skill level in a particular area. Regression Analysis: A statistical method for examining the relationship between a dependent variable and one or more independent variables by fitting a linear equation to observed data. Entering GPA: Entering GPA refers to the grade point average of a student at the time of admission or entry into a new educational institution or program.