Representation and summary of data - location 0.0 / 5 ? StatisticsRepresentation of data - locationASEdexcel Created by: temi9Created on: 21-04-15 20:56 What are quantitative variables? (Values associated with) numerical observations 1 of 10 What are qualitative variables? (Values associated with) non-numerical observations 2 of 10 What is a continuous variable? A variable that can take any value in a given range 3 of 10 What is a discrete variable? A variable that can take only specific values in a given range 4 of 10 Formula for combining means x= (n'x' + n''x'')/ n' + n'' 5 of 10 Coding form y= (x-a)/b 6 of 10 How do you find the median for continuous data? n/2 and use interpolation to find the value of the corresponding term 7 of 10 When do we use the mode? When data is qualitative, or quantitative (either modal or bimodal). Not informative if values occur only once 8 of 10 When do we use the median? Used for quantitative data with extreme vales (as it is unaffected by them) 9 of 10 When do we use the mean? Used for quanititative data and uses all data. Gives a true measure of data, but affected by extreme values 10 of 10
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