S1 - Location 0.0 / 5 ? MathematicsLocation of DataASEdexcel Created by: jackjj9Created on: 20-11-16 12:07 What is the official notation for the mean of discrete or grouped data? X bar (x with a line on the top) 1 of 8 What is the formula to calculate x bar from discrete data? x bar = sigma(x)/n 2 of 8 What is the formula to calculate x bar from grouped data? x bar = sigma(fx)/sigma(x) : where x = midpoint of each group and f = group frequency 3 of 8 What is the formula to calculate a combined mean? x bar = (n1*xbar1)+(n2*xbar2) / n1 + n2 4 of 8 What method is used to find the median from grouped data? Interpolation 5 of 8 What is the formula used for interpolation? LB +[(places into group / group frequency) * class width] 6 of 8 How do find how far into a group the median is? Take number value that it is and take away the cumulative frequency of the group before from it 7 of 8 How do you calculate the median from discrete data? (n +1)/2 8 of 8
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