Questions

• Measures of Dispersion Understand the concept of standard deviation for both grouped and ungrouped data sets Compare dispersions of different data sets using appropriate measures

  下面的箱形圖顯示了一些學生在英語測試中的成績分佈。標準差為62分，平均分高於119分但低於136分。已知Alice的成績高於第三四分位數，以下哪個可能是她的標準分數？

  

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• Measures of Dispersion Understand the concept of standard deviation for both grouped and ungrouped data sets Compare dispersions of different data sets using appropriate measures

  四個數字$\left\{x_{1}, x_{2}, x_{3}, x_{4}\right\}$的方差是7.5，五個數字$\left\{y_{1}, y_{2}, y_{3}, y_{4}, y_{5}\right\}$的方差是4.2。已知這兩組數字的平均值相同。求這九個數字$\left\{x_{1}, x_{2}, x_{3}, x_{4}, y_{1}, y_{2}, y_{3}, y_{4}, y_{5}\right\}$的標準差。

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• Measures of Dispersion Understand the concept of dispersion Construct and interpret the box-and-whisker diagram to compare data distributions

  下面的盒鬚圖顯示了6A班學生在某天復習所花時間（以分鐘計）的分佈。以下哪一項必定是真的？ I. 該分佈的範圍與四分位距之差為0.2小時。 II. 至少一半的6A班學生那天在復習上花費超過55分鐘。 III. 如果隨機選擇一名6A班的學生，他/她那天在復習上花費68分鐘或以上的概率為0.25。

  

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• Measures of Dispersion Understand the concept of standard deviation for both grouped and ungrouped data sets Compare dispersions of different data sets using appropriate measures

  在一次測試中，兩位選定學生的測試成績之差和標準分數之差分別為20分和4。在該測試中，測試成績的標準差是

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• Measures of Dispersion Understand the effect of adding/multiplying a constant on the dispersion of data

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• Measures of Dispersion Understand the effect of adding/multiplying a constant on the dispersion of data

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• Measures of Dispersion Understand the effect of adding/multiplying a constant on the dispersion of data

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• Measures of Dispersion Understand the effect of adding/multiplying a constant on the dispersion of data

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• Measures of Dispersion Understand the effect of adding/multiplying a constant on the dispersion of data

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• Measures of Dispersion Understand the effect of adding/multiplying a constant on the dispersion of data

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