ques in statistics

Question 6. [Marks: 12.5] a) Strength tests carried out on some samples of copper wires from two brands. The results [7] obtained from the first brand are (in lbs.) 43, 44, 44.5, 44, 45, 46, 45.5, and the results from the second brand are (in lbs.) 44.5, 45, 45, 46.5, 47, 46, 47.5. Compare between the two brands regarding the strengths of the wires produced by them. b) Use any two averaging methods to find the average age of the viewers of newly arrived movies [5.5] in Star Cineplex during the last one year. Comment on your result. Age (years) 10 - 15 15 -20 20 - 25 25 -30 30 - 35 35 -40 40- 45 45-50 Number of viewers 345 795 1680 1805 1150 760 210 185 Page 3 of 3