Segmentation analysis when no clusters exist, use the k-means algorithm to partition cases into contiguous groups. training data copyright © sas institute inc. all rights reserved. 28 8.01 multiple choice poll for a k-means clustering analysis, which of the following statements is true about input variables? a. input variables should be limited in number and be relatively independent. b. input variables should be of interval measurement level. c. input variables should have distributions that are somewhat symmetric. d. input variables should be meaningful to analysis objectives. e. all of the above