Question: Given the following work sampling data, based upon 1 0 0 random observations of a particular worker: ACTIVITY NO OF TIMES OBSERVED A 2 0

Given the following work sampling data, based upon 100 random observations of a particular worker:
ACTIVITY NO OF TIMES OBSERVED
A 20
B 50
C 10
Others 20
What is the estimated proportion of time this worker spends performing activity A? B? C?

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