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Find mean {{1,2,5,6-10,10-20,20-30,30-50,50-70,70-100},{3,4,10,23,20,20,15,3,2}}

Solution:
Your problem `->` mean {{1,2,5,6-10,10-20,20-30,30-50,50-70,70-100},{3,4,10,23,20,20,15,3,2}}


Class
`(1)`
Frequency `(f)`
`(2)`
Mid value `(x)`
`(3)`
`f*x`
`(4)=(2)xx(3)`
13 1 `1=1` 3 `3=3xx1`
`(4)=(2)xx(3)`
24 2 `2=2` 8 `8=4xx2`
`(4)=(2)xx(3)`
510 5 `5=5` 50 `50=10xx5`
`(4)=(2)xx(3)`
6 - 1023 8 `8=(6+10)/2` 184 `184=23xx8`
`(4)=(2)xx(3)`
10 - 2020 15 `15=(10+20)/2` 300 `300=20xx15`
`(4)=(2)xx(3)`
20 - 3020 25 `25=(20+30)/2` 500 `500=20xx25`
`(4)=(2)xx(3)`
30 - 5015 40 `40=(30+50)/2` 600 `600=15xx40`
`(4)=(2)xx(3)`
50 - 703 60 `60=(50+70)/2` 180 `180=3xx60`
`(4)=(2)xx(3)`
70 - 1002 85 `85=(70+100)/2` 170 `170=2xx85`
`(4)=(2)xx(3)`
------------
`n = 100`-----`sum f*x=1995`


Mean `bar x = (sum fx)/n`

`=1995/100`

`=19.95`








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