................... Solve Q2 only

Q1. In the manufacture of a certain scientic instrument great importance is attached to the life of a critical component. This cumposnent is obtained in bulk from two sources, A and B, and in a course of inspection, the lives of 1000 of the components from each source are determined. The following equency tables are obtained: Q2. Source A Source B Life (hours) No. of Lie (hours) No. of components components 1000 1020 40 1030 1040 339 1020 1040 96 1040 1050 136 1040 1060 364 1050 1060 25 1060 - 1080 372 1060 - 1020 20 10801100 85 1070 1080 130 1100-1120 43 1080 1090 350 Examine the e'ectiveness of the measures of dispersiOH with which you are familiar for comparing the dispersion of the two distributions. What are the numerical scales of measurements and dene their types with examples? l5