when calculated using direct method threw mean of the data set shown in thetable below is 31 . 0-10 10-20 20-30 40-50 50-60 60-70 70-80 frequency 22 24 35 30 27 m 6 4 what is the frequency for the the class interval 50-60
Answers
Given : mean of the data set shown in the table below is 31
0-10 10-20 20-30 30-40 40-50 50-60 60-70 70-80
frequency 22 24 35 30 27 m 6 4
To Find : frequency for the the class interval 50-60
Solution :
Class Mean d=(Mean -25)/10 f df
0-10 5 -2 22 -44
10-20 15 -1 24 -24
20-30 25 0 35 0
30 - 40 35 1 30 30
40-50 45 2 27 54
50-60 55 3 m 3m
60-70 65 4 6 24
70-80 75 5 4 20
148+m 60 + 3m
Mean = 25 + 10 x ( 60 + 3m) / (148 + m) = 31
=> 10 x ( 60 + 3m) / (148 + m) = 6
=> 600 + 30m = 888 + 6m
=> 24m = 288
=> m = 12
frequency for the the class interval 50-60 = 12
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AM is 29 .find the missing frequency .x-5,15,25,35,45,55,f-5,7
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AM is 29 .find the missing frequency .x-5,15,25,35,45,55,f-5,7
brainly.in/question/24128533
