數學題(平均數)

🎓 學業台小學及中學教育

KAI YIN

2007-01-27 11:09 pm

請計算下列平均數？
66 218 142 128 131 90 221 79 148 89 225 68 67 234 75 134 84 238 137 146 220 74 227 140 231 135 224 139 88 212

回答 (6)

Heung Kit

2007-01-27 11:15 pm

✔ 最佳答案

(66+218+142+128+131+90+221+79+148+89+225+68+67+234+75+134+84+238+137+146+220+74+227+140+231+135+224+139+88+212)
/ 30
= 4410/30
=147

2007-01-28 16:02:27 補充：
Example 112 6 15 3 12 6 21 15 18 12 ====================Casio MODE 2 SHIFT AC 12 M or RUN 6 M or RUN ... 12 M or RUN 1. The mean is... SHIFT 4 2. The sample standard deviation is... SHIFT 6 3. The sample variance is... SHIFT 6 x²

2007-01-28 16:02:52 補充：
Sharp MODE 3 2ndF ON/C 12 ) 6 ) ... 12 ) 1. The mean is... RCL 4 2. The sample standard deviation is... RCL 5 3. The sample variance is... RCL 5 x² ==================== 用番以上方法入番d數字就可以了

2007-01-28 16:03:31 補充：
http://ihome.ust.hk/~kailam/jenny/calculator.html

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