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Patients who attended clinic in one week grouped by age as shown in the table below.

 X
 Age (years) 
 No. of patients 
 
 0 - 5 14
 5 - 15 41
 15 - 25 59
 25 - 45 70
 45 - 75 15
  1. Estimate the mean age. 
  2. On the graph provided , draw a histogram to represent the distribution.

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 X
 Age (years) 
 No. of patients(F)  x  FX 
 0 - 5 14 2.5   35
 5 - 15 41 10  410 
 15 - 25 59 20 1180 
 25 - 45 70 35 2450
 45 - 75 15 60 900
 Σf =199 Σfx 4975
 
  1. x̄ = Σfx
           Σf
    x̄ = 4975
           199
    x̄ = 25years

  2. graph representing histogram
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