Question

5-15 15-25 25-35 35-45 45-55 55-65 65-75 f:6 10 16 15 24 8 7find median

Answer 1

class interval fi. xi C.F.
5-15 6. 10 6
15-25. 10. 20 16
25-35. 16. 30. 32
35-45. 15. 40. 47
45-55. 24. 50. 71
55-65. 8. 60. 79
65-75. 7. 70. 86
n/2 - 86/2=43

$median = l + ( \frac{ \frac{n}{2} - cf }{fi} ) \times h$
= 35+ (43-32/15)×10
35+ 9/15×10
35 + 3/5×10
35 + 6
=41

Answer 2

Answer:

41

Step-by-step explanation:

Class interval  fi   xi   c.f.

5-15       6     10    6

15-25    10    20   16

25-35   16    30   32

35-45   15    40    47

45-55   24   50    71

55-65     8   60    79

65-75     7    70    86

n = 83

n/2 - 86/2=43

median = 35+ (43-32/15)×10

35+ 90/15

35 + 6

=41