Find the mean of the following deta
class 50-70 70-90 90-110/110-130/30-150 150-1701
Frequency / 10 18 7 4 6 5 4
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Step-by-step explanation:
Frequency(f i ) f i x i
Class interval x i
50-70 60 10 600
70-90 80 18 1440
90-110 100 7 700
110-130 120 4 480
130-150 140 6 840
150-170 160 5 800
Σf i = 50
Σf i x i = 4200
mean= Σf i x i
Σf i
=4200/50
=84
hope it will help you
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