| 1 | 2 | 3 | 4 | 5 | 6 |
Mean | 2.567 | 0.747 | 0.509 | 2.332 | —— | 521.145 |
Standard deviation | 1.150 | 0.321 | 0.377 | 2.390 | —— | 71.076 |
Computer information activity | 1.000 |
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Computer basic skills | 0.318*** | 1.000 |
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Computer advanced skills | 0.243*** | 0.575*** | 1.000 |
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Using years | 0.257*** | 0.181*** | 0.226*** | 1.000 |
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Types of urban-rural schools | 0.141*** | 0.128*** | 0.087*** | 0.222*** | 1.000 |
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Reading literacy | 0.100*** | 0.102*** | −0.097*** | 0.045*** | 0.190*** | 1.000 |