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posted by  Hussain on 10/20/2007 11:04:15 PM  |  status: Live  

Stats

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Note :This is grouped data,so please find the median and mode by the formula for the gropued data.Someone has  asked this question earlier,but person replied by finding the mode and median,applying the formula for ungrouped data.


Find Median and Mode from the following distribution.

 

Daily Wages(Rs.)

25-30

30-35

35-40

40-45

45-50

50-55

55-60

f

1

2

9

10

11

12

5

 

 

 

 

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Oracle
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posted by illusion on 10/21/2007 1:36:58 AM  |  status: Live
Asker's Rating: Helpful   
Hussain's comment:
"Thanks for help"
Response Details:
This is for grouped data.
 
Median: where 50% of the data is...which is between 40-45 and 45-50
 
To find exact value of median use:
 
Median = BI + [n/2 - F / fQ2] * a
 
BI: inferior limit of the class that contains Q1
n: Sample size which is 50 here
F: The sum of the absolute frequences of the preceding classes that contains Q2
FQ1: Absolute frequence of the class that contain Q2
a: amplitude of the class.
 
To find the mode:
 
Find the class with the most absolute frequence (in this case its 50-55), the mode is the value of the centre of that class so the answer would be 50+55/2 = 52.5
 
This is what my book says for median and mode of grouped data.
Please rate me for the time it takes to help you!!! ty.
 
Did you know if you mesure the length of your arm and divide by the length of your elbow to your finger you will get
As of today in 2008, nobody in the world has found the sum of all they know is that it converges because of the p-serie theorem but they cannot find the sum.

One of my teachers, as been working on that sum for about 5 years now, he found a concret answer (he ended up creating an instrument of that serie called ''tritare'' its pretty cool) but he has not found a mathematical expression to express it.
 
For more info:
 
 
My pic is the instrument called Tritare.
 
Scholar
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posted by Thisisdefunct! on 10/21/2007 1:47:27 AM  |  status: Live
Asker's Rating: Somewhat Helpful   
Hussain's comment:
"Thanks"
Response Details:

 

median = Σ f x/Σf

{25+30/2 (1) + 30+35/2 (2) +35+40/2 (9) + 40+45/2 (10)  + 45+50/2 (11) + 50+55/2  (12) + 55+60/2 (5) }/ 50
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posted by M Asad on 10/21/2007 3:42:44 AM  |  status: Live
Asker's Rating: Lifesaver   
Hussain's comment:
"Thanks for answer"
Response Details:
 

f

C.B

1

2

9

10

11 f1

12fm

5 f2

25-30

30-35

35-40

40-45

45-50

50-55

55-60

  


 

 
 
 

50+[(12-11)/ (12-11)+(12-5) ]*5

    

=50+0.625

=50.0625
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