求以下的英文解答和英文解释.
Anticipate the answer for the average test score among a class of seven students.Give a range that the answer should be in.Check your answer by solving for the actual average.Is your answer reasonable?
Scores
78
85
65
83
87
75
90
人气：194 ℃ 时间：2020-10-01 04:16:55
解答
预想一下七个学生成绩平均值的结果.给这个结果一个应该的范围.计算这个平均值的实际结果,检查一下你的预想是否合理?
成绩
78
85
65
83
87
75
90
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