Question

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.

Answer 1

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. 
   

Answer 2

1.25