the marks of 18 students in a science unit test were as follows:
10,12,6,2,9,15,18,13,12,13,7,14,19,12,5,7,11,9
calculate: i) the mean ii) the median iii) the mode
ramkrishnmp1994:
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Answers
Answered by
1
Answer:
Arranging the terms in ascending order:
2,6,8,9,10,11,11,12,13,13,14,14,15,15,15,16,16,18,19,20
Number of terms =20
∑x=2+6+8+9+11+11+12+13+13+14+14+15+15+15+15+16+16+18+19+20=257
(i) Mean =∑x/∑n=257/20=12.85
(ii) Median =(10
th
term +11
th
term)/2=(13+14)/2=27/2=13.5
(iii) Mode =15 since it has maximum frequencies i.e. 3:
Answered by
2
Answer:
i) 10.77
ii) 12,13
iii) 12,7,9
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