Answer:
Mean = 35
Median = 0.5(n + 1)th term
Median = 0.5(9) = 4.5th term
(30 + 34) /2 = 32
Mode = 30 ( most frequent)
Range = (51 - 20) = 31
Mean = 72
Median = 0.5(n + 1)th term
Median = 0.5(9) = 4.5th term
4th + 5term = (72 + 77) /2 = 74.5
Mode = 72 ( most frequent)
Range = (90 - 48) = 42
Step-by-step explanation:
Given :
1.)
Data: 30 , 40 , 51 , 30 , 34 , 20, 30, 45
Rearranged data : 20, 30, 30, 30, 34, 40, 45, 51
Mean = ΣX / n = 280 / 8
Mean = 35
Median = 0.5(n + 1)th term
Median = 0.5(9) = 4.5th term
(30 + 34) /2 = 32
Mode = 30 ( most frequent)
Range = (51 - 20) = 31
2.)
90 , 72 , 48 , 84 , 77 , 72, 50, 83
Rearranged data : 48, 50, 72, 72, 77, 83, 84, 90
Mean (m) = ΣX / n = 576 / 8
Mean = 72
Median = 0.5(n + 1)th term
Median = 0.5(9) = 4.5th term
4th + 5term = (72 + 77) /2 = 74.5
Mode = 72 ( most frequent)
Range = (90 - 48) = 42
