The marks(out of 100)obtained by a group of students in a science test are 85, 76, 90, 39, 48, 56, 95, 81, and 75. Find the
1)highest and lowest mark obtained by students
2)range of the marks obtained
3)mean mark obtained by the group
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1) highest : 95
Lowest: 48
2) largest observation - smallest observation
= 95-48
= the range of the data = 47
3) mean= sum of observations/ number of observations
=85+76+90+39+48+56+95+81+75f / 8
= 645/8
= 8 5/8
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