Reignhart Blanco, BSN
MMW Seatwork
1. 69, 75, 78, 84, 85, 88, 90, 92
Mean = 661 / 8 = 82.63
Median = (84 + 85) / 2 = 169 / 2 = 84.5
Mode = No mode
2. 26, 28, 30, 37, 45, 50, 59, 75, 86, 90 Mean
= 526 / 10 = 52.6
Median = (45 + 50) / 2 = 95 / 2 = 47.5
Mode = No Mode
3. 10, 11, 11, 12, 14, 14, 18, 19, 20, 25
Mean = 154 / 10 = 15.4
Median = (14 + 14) / 2 = 28 / 2 = 14
Mode = 11 and 14 (Bimodal)
4. 28, 31, 34, 35, 38, 40, 42, 46, 49, 50, 55, 55, 61, 65
Mean = 629 / 14 = 44.93
Median = (42 + 46) / 2 = 88 / 2 = 44
Mode = 55 (Unimodal)
5. 3.4, 3.9, 4.4, 4.7, 5.2, 5.5, 5.7, 6.3, 6.3, 7.6, 8.6, 9.4
Mean = 71 / 12 = 5.92
Median = (5.5 + 5.7) / 2 = 11.2 / 2 = 5.6
Mode = 6.3 (Unimodal)
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6.
Class
Interval
f
x
fx
lb
<cf
19 – 21
7
20
140
18.5
7
16 – 18
9
17
153
15.5
16
13 – 15
10 – 12
12
10
14
11
168
110
12.5
9.5
28
38
7– 9
2
8
16
6.5
40
N=40
∑fx = 587
Mean = [(7) (20) + (9) (17) + (12) (14) + (10) (11) + (2) (8)] / 40 =
587 / 40 = 14.68 cf = 16 lbmc = 12.5 fmc = 12 cw= 3
Median = 12.5 + {[(40/2) – 16] / 12} 3 = 12.5 + {[20 – 16]} 3 = 12.5 + {4} 3 =
12.5 + 12 = 24.5 lbmo = 12.5 D1 = 9 D2 = 10 cw = 3
Mode = 12.5 + [9 / (9 + 10)] 3 = 12.5 + [9 / 19] 3 = 12.5 + [0.47]3 = 12.5 + 1.42 = 13.92
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