Qualification > Reference Material

IGCSE Math - Bearing

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Galleria:
oh sorry . that should be s09 . not s08 . :D

elemis:
Use the graph to find P and Q then input it into the table.

Next for ii  find the middle value of each class interval (in blue below).

Multiply the Middle Value to its corresponding frequency :

5 x 12 = 60

15 x 34 =  510
etc.

You see the above values in red ? Add those up to get 7220 and divide it by 200 (just add 12+ 34+ 36+ 30+ 38+ 30+ 16 + 4)

You will get a mean of 36.1 I think.

Is that correct ?

elemis:

--- Quote from: Galleria on August 30, 2010, 02:22:26 pm ---oh sorry . that should be s09 . not s08 . :D

--- End quote ---

Hang on.

Galleria:
sorrry lol

elemis:
2 more minutes. I'm making a diagram.

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