Step-by-step explanation:
this is the assumed mean method
Answer: a = assumed mean. fi = frequency of ith class. di = xi – a = deviation of its class. Σfi = n = Total number of observations. xi = class mark = (upper class limit + lower class limit)/2.
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Step-by-step explanation:
this is the assumed mean method
Answer: a = assumed mean. fi = frequency of ith class. di = xi – a = deviation of its class. Σfi = n = Total number of observations. xi = class mark = (upper class limit + lower class limit)/2.
Step-by-step explanation: