1. The table below contains data about the cost of electricity (in RM) during a recent month for a random sample of 40 two-bedroom apartments in Petaling Jaya. Answer the following questions. 97 198 148 163 89 175 143 209 121 94 150 131 107 187 116 172 178 103 188 121 110 150 172 128 162 162 144 122 150 134 100 143 156 177 120 118 108 88 153 168 a. Construct a frequency distribution for the above data set using six classes. (2 Marks) b. Using the result from part (i), calculate the relative frequencies for each class. (1 Mark) c. Construct a frequency histogram for these data. (2 Marks) [Total: 5 Marks] 2. Below is a sample of ten students' scores in a Statistics examination. 89 67 75 79 93 39 67 71 42 38 a. Calculate the mean score. (1 Mark) o. Find the median and mode. (1 Mark) c. Calculate the standard deviation for the sample data. (3 Marks) [Total: 5 Marks] 3. A business school at a particular university has 25 full-time faculty members. The following table shows the number of faculty members grouped by years of teaching experience. Years of Teaching Experience Number of Faculty 5- 9 11 10 - 14 7 15 - 19 5 20 - 24 2 a. Calculate the mean years of teaching experience. (1 Mark) b. Calculate the standard deviation for the population data. (3 Marks) [Total: 4 Marks]