how to calculate the MEDIAN (not the range but the exact value)of height of the following table?
The heights of 100 students
Height(cm)............Frequency
140-144..................10
145-149 .................20
150-154..................25
155-159..................35
160-164..................8
165-169..................2
I know the median is between 150-154, but how can I get the exact value without
drawing a graph)
數學median急!!! 20點
2013-01-23 7:28 am
回答 (2)
2013-01-23 5:25 pm
✔ 最佳答案
how to calculate the MEDIAN (not the rangebut the exact value)of height of the following table?The heights of 100 students
Height(cm)............Frequency
140-144..................10
145-149 .................20
150-154..................25
155-159..................35
160-164..................8
165-169..................2
Sol
142..................10
147 .................20
152..................25
157..................35
162..................8
167..................2
=>0+142…................10
5+142.. .................20
10+142..................25
15+142..................35
20+142..................8
25+142..................2
=>
142+(5*20+10*25+15*35+20*8+25*2)/(10+20+25+35+8+2)
=142+1085/100
=142+10.85
=152.85
2013-01-23 8:08 am
149.5+(20/25)*5=153.5
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