Question

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​

Answer 1

Answer:

Class interval Frequency (fi​)  xi​=2lower limit + upper limit​ fi​xi​  

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   Σfi​xi​=1360  

Mean = Σfi​Σfi​xi​​=501360​=27.2

Step-by-step explanation: