Calculate the mean of the following data.
Class 4-7 8-11 12-15 16-19
Frequency 5 4 9 10
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Answer:
Mean=12.93(approx)
Step-by-step explanation:
Class Frequency (f) mid class (x) fx
4-7 5 5.5 27.5
8-11 4 9.5 38.0
12-15 9 13.5 121.5
16-19 10 17.5 175.0
______ _____
28 362
∴Mean =362/28 =12.93 (approx)
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