Find the mean of the data
Class: less than 20;less than 40; less than60;less than 80;less than100
Frequency: 41 ; 51 ; 64 ; 88 ; 97
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Answer:
answer is 32.47
Step-by-step explanation:
class frequency xi xifi
0-20 41 10 410
20-40 10 30 300
40-60 13 50 650
60-80 24 70 980
80-100 9 90 810
total 97 3150
mean = sigma xifi/sigma fi=3150/97=32.47
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