20 points question. class 9 i will Surely mark as brainiest
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The mean is an appropriate measure of central tendency when data is not skewed. When the data is skewed we prefer median to mean.
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(i) Because of its unique value and can be used to compare different groups of data.
Ex: Marks of a student in 7 subjects:
10,35,90,78,55,23,14
Mean = (10 + 35 + 90 + 78 + 55 + 22 + 14)/7
= 43.4.
43.4 is the appropriate measure of central tendency.
(ii)
Ex: Marks scored by a student in 5 subjects.
20,30,55,65,75
Median = 55.
55 is an appropriate measure of central tendency.
Hope this helps!
Ex: Marks of a student in 7 subjects:
10,35,90,78,55,23,14
Mean = (10 + 35 + 90 + 78 + 55 + 22 + 14)/7
= 43.4.
43.4 is the appropriate measure of central tendency.
(ii)
Ex: Marks scored by a student in 5 subjects.
20,30,55,65,75
Median = 55.
55 is an appropriate measure of central tendency.
Hope this helps!
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