题目有学生考试成绩的值:60,45,33,77,80,100,100,90,70,65。则学生成绩的标准差为(A. 442.8B. 443C. 21.04D. 22有学生考试成绩的值:60,45,33,77,80,100,100,90,70,65。则学生成绩的标准差为(A. 442.8B. 443C. 21.04D. 22题目解答答案C. 21.04