. Variance (2) is simply the average of the squared differences from the mean. . A. What is the variance of the data set (8, 16, 21, 16, 36)? . Find the mean? . find the differences from the mean? . Find the squared differences? . Find the average of the squared differences? o What is the value of the Standard Deviation? . B. Conditional Probability o BCS students sit for a summative examination. Seventy-five percent of pupils passed both examinations, although the first was simpler - 88 percent passed. How many pupils who passed the first examination also passed the second? . A signifies passing the initial examination, whereas B signifies passing the subsequent examination