1. Use problem 6 on page 3-18 to fill in the table and answer the following questions (Using Dmethod). Class Interval Given f X X2 cf Fx method fX fX2 d -2 -1 0 1 2 Total a) Mean b) Median c) Mode d) Range fd d-method d2 fd2 e) Variance g) Quartile 1st f) Standard deviation