T4.2 The data in the following set represent measurements of the time, in seconds, it takes for SMS messages to be received by the mobile devices of a certain number of people, on a specific day. The distance between emitting equipment and receiving equipment is considerably large: 87 103 130 160 180 195 132 145 211 105 145 153 152 138 87 99 93 119 129 a. Calculate the sample variance and sample standard deviation b. Interpret the value of S obtained c. If the values were expressed in minutes, what would be the results for both measures of dispersion? d. Find the range of the data and the value of K that would be used if an empirical distribution were to be constructed for this variable