The mean of the following data is 15. Find the value of "F".
Class Interval Frequency
0 - 6 5
6 - 12 4
12 - 18 F
18 - 24 6
24 - 30 4
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Answered by
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Step-by-step explanation:
Mean =∑fi∑xifi
⇒mean =6+p+6+10+5(5×6)+(10×p)+(15×6)+(20×10)+(25×5)
⇒mean =27+p30+10p+90+200+125=15
⇒405+15p=445+10p
⇒5p=40
⇒p=8
Answered by
2
CI. fi. xi. fixi
0 - 6 5 3 15
6 - 12 4 9 36
12 - 18 F 15 15f
18 - 24 6 21 126
24 - 30 4 27 108
€fi=19+f €fixi=285+f
f= 0
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