1. The given data are the ratings in percent of 12 teacher applicants. 81, 70, 73, 69, 85, 78, 82, 90, 70, 84, 82, 85. Find the mean, median and mode of the given data. 2. Find the mean, median and mode and standard deviation of the recorded speed in typing per minute of the Secretarial applicants. 65, 78, 80, 45, 56, 71, 65, 85, 75. 3. A fruit dealer records the number of kilos he sells from Monday to Sunday and obtain the following figures; 15, 45, 21, 18, 33, 65, 71. Find the mean and standard deviation.