find the mean by Assumed mean method and direct method
clas intervals frequency
0-5. 7
5-10 2
10-15. 1
15-20. 3
20-25. 1
25-30. 4
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Answer:
Class interval Frequency (fi) xi=2lower limit + upper limit fixi
0−10 7 5 35
10−20 8 15 120
20−30 12 25 300
30−40 13 35 455
40−50 10 45 450
Σfi=50 Σfixi=1360
Mean = ΣfiΣfixi=501360=27.2
Step-by-step explanation:
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