Find the mean deviation about median of following data : Class Interval 20-30 30-40 40-60 60-80 80-90 Frequency 5 10 20 9 6.
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Answer:
MEAN =52
WE SHOULD ADD THE FREQUENCY WE GET 50
WE ADD THE NUMBERS IS FiXi fi is the middel value of ci then we should ADD fi×xi we get fixi value
THE MEAN FORMULA IS
€FiXi
÷÷÷÷÷÷÷÷÷÷÷÷÷÷÷÷
€fi
subttute the value we get answer is 53
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