4. Find the mean of the following frequency distribution: Class 0-6 6-12 12-18 18 - 24 | 24 - 30 Frequency 7 5 10 12 6 11 1 1
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Answer:
Mean of the distribution is ->16.05 .
Step-by-step explanation:
0 - 6 => midpoint (x) = 3 , frequency = 7
6 - 12 => midpoint (x) = 9 , frequency = 5
12 - 18 => midpoint (x) = 15 , frequency = 10
18 - 24 => midpoint (x) = 21 , frequency = 12
24 - 30 => midpoint (x) = 27 , frequency = 6
Mean = (( 3*7 )+(9*5)+(15*10)+(21*12)+(27*6))/(7+5+10+12+6)
= 642/ 40
= 16.05 .
Mean of the distribution is ->16.05 .
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