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標題:
數學題(平均數)
發問:
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 更新: 加原因 更新 2: 不能用這方法: (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)除30 更新 3: 正經的答案!
最佳解答:
(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
其他解答:
答案:147!|||||(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)除30=147|||||147,用計數機.|||||簡而精:*147*|||||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 既平均數係1476A560DB68EC65D60