Answer Happy

6. Twenty-five randomly selecte complicated appendectomios lasted for the following lengths of time (minutes) 113 118 12 123 126 128 130 135 136 137 138 139 140 M 142 142 142 143 155 157 157 158 59 164 140 a) Find the number of classes. b) Generate a frequency distribution table for the above data using (110 J20). [120,13%), 50 on dive the frequencies (1), relative frequencies (f/n), cumuylave frequencies (F) and percentage cumylative Frequencies (%F), (i) How many appendectomies lasted between 140 and 150 minutes? (ii) How many appendectomies lasted at least two and a half hours? (iii) How many appendectomies lasted less than two and a half hours? (iv) How many appendectomies lasted two and a half hours or more? {v) What percentage of the appendectomies lasted two hours or more? (vi) What percentage of the appendectomies that did not last two hours or longer? c) Generate a relative frequency histogram. d) Calculate the following: (i) the sample mean (ii) the sample variance (iii) the sample standard deviation