The semester project came back from the copy store and to her horror, the project leader has just noticed that the left side y-axis of a key Pareto chart was cut off due to a printing error
The bar chart component uses the missing left side y-axis and the cumulative percentage line on the Pareto chart uses the right side y-axis. The project leader is pretty sure that the total number of observations in all combined categories is 200. Can you help her develop estimates of the counts for each of the five categories?
The actual counts for the five categories are:
Category Count
MC 104
FB 42
TF 40
SA 8
PB 6
Some allowance should be made for alignment in reading the graph's right hand y-axis and matching up the location of the cumulative percentage markers for each category. Because the total number of observations equals 200, the percentages on the right side y-axis can be multiplied by 200 to yield estimates of the count values. Based on a rough reading:
MC = 200 × 52.5 = 105
FB = 200 × (72.5 - 52.5 ) = 40
TF = 200 × (92.5 - 72.5 ) = 40
SA = 200 × (97.5 - 92.5 ) = 10
PB = 200 × (100 - 97.5 ) = 5
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