# Matematicas

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• Publicado : 26 de mayo de 2010

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1. Find the mean of the following data: |
| | | |
6.4 | | | |
6.5 | | Mean: | 6.79 |
6.7 | | | |
6.7 | | | |
6.8 | | | |
6.8 | | | |
6.9 | | | |
7 | | | |
7 | | | |
7.1 | | | |
2. Write your last grades of the semester of math and calculate the mean, median and mode: |
| | | | | | |
85 | | Mean | 96.25 | | | |
100 | |Mode | 100 | | | |
100 | | Median | 100 | | | |
100 | | | | | | |

3. With the following data elaborate a table of frequency, a histogram and a frequency polygon. Find the value of the mean, median and mode: |
| | | | |
20 | | ClassInterval | Midpoint | f |
21 | | 17 – 19 | 18 | 0 |
22 | | 20 – 22 | 21 | 11 |
26 | | 23 – 25 | 24 | 10 |
25 | | 26- 28 | 27| 5 |
23 | | 29 – 31 | 30 | 0 |
24 | | | | |
20 | | | | |
20 | | | | |
21 | | | | |
22 | | | | |
25 | | | | |
23 | | | | |
24 | | | | |
21 | | | | |
21 | | | | |
25 | | | | |
23 | | | | |
22 | | | | |
22 | | | | |
25 | | | | |
26 | | | | |
26 | | | | |
26 | | | | |
25 | | | | |
26| | | | |
Mode: 21
Median: 24
Mean: 23.30

4. With the given data do the following: | | | | |
Ordered | | | a) Orderthem | | | | |
60 | 60 | | b) Elaborate a treediagram | | | |
60 | 70 | | c) Elaborate a table of frecuency of grouped data in 4 intervals |
60 | 75 | | d) Elaborate a table of frecuencies of grouped data in 8 intervals |
61 | 83 | | e) Findthe mean for the questions c and d | |
63 | 87 | | | | | | |
63 | 90 | | | | | | |
63 | 98 | | ClassInterval | Midpoint | f | fxi | |
64 | 61 | | 59 - 70 | 64.5 | 18 | 1161 | |
65 | 66 | | 71 - 82 | 76.5 | 31 | 2371.5 | |
65 | 74 | | 83 - 94 | 88.5 | 16 | 1416 | |
66 | 75 | | 95 - 106 | 100.5 | 5 | 502.5 | |
66 | 81 | | | | 70 | 5451 | |
66 | 87 | | || x-bar | 77.8714286 | |
69 | 91 | | Mean: | 77.87 | | | |
69 | 97 | | | | | | |
70 | 63 | | | | | | |
70 | 65 | | | | | | |
70 | 70 | | | | | | |
71 | 79 | | | | | | |
73 | 80 | | TreeDiagram | | | | |
73 | 86 | | | | | | |
74 | 90 | | 6 | 0,0,0,1,3,3,3,4,5,5,6,6,6,9,9 |   |
74 | 95 | | 7 |0,0,0,1,3,3,4,4,4,5,5,5,5,5,5,6,7,7,7,7,8,8,8,9,9 |
74 | 63 | | 8 | 0,0,1,1,1,1,1,2,2,3,4,4,4,5,6,6,7,7,7 |   |
75 | 66 | | 9 | 0,0,0,1,1,2,5,5,7,8 | |   |
75 | 74 | | 10 | 0 |   |   |   |
75 | 77 | | | | | | |
75 | 81 | | | | | | |
75 | 86 | | | | | | |
75 | 92 | | | | | | |
76 | 95 | | | | | | |
77 | 60 | | | | | | |
77 | 66 | | | | | | |
77 | 71 | | | | | | |77 | 76 | | | | | | |
78 | 80 | | | | | | |
78 | 63 | | | | | | |
78 | 69 | | | | | | |
79 | 74 | | | | | | |
79 | 75 | | | | | | |
80 | 81 | | | | | | |
80 | 85 | | | | | | |
81 | 90 | | | | | | |
81 | 64 | | | | | | |
81 | 69 | | | | | | |
81 | 73 | | | | | | |
81 | 77 | | | | | | |
82 | 84| | | | | | |
82 | 87 | | | | | | |
83 | 91 | | | | | | |
84 | 60 | | | | | | |
84 | 65 | | | | | | |
84 | 70 | | | | | | |
85 | 77 | | | | | | |
86 | 84 | | | | | | |
86 | 73 | | | | | | |
87 | 78 | | | | | | |
87 | 84 | | | | | | |
87 | 75 | | | | | | |
90 | 81 | | | | | | |
90 | 75 | | || | | |
90 | 82 | | | | | | |
91 | 78 | | | | | | |
91 | 81 | | | | | | |
92 | 75 | | | | | | |
95 | 82 | | | | | | |
95 | 79 | | | | | | |
97 | 77 | | | | | | |
98 | 78 | | | | | | |
100 | 100 | | | | | | |
ClassInterval | Midpoint | f | fxi |
[60 - 65) | 62.5 | 8 | 500 |
[65 - 70) | 67.5 | 7 | 472.5 |
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