题目内容

在作两样本均数比较时,已知n1、n2均小于30,总体方差不齐且呈极度偏态的资料宜用

A. t检验
B. 卡方检验
C. z检验
D. 方差分析
E. 秩和检验

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配对计量资料,差值分布不服从正态分布,应选用

A. 配对t检验
B. F检验
C. 卡方检验
D. 配对比较的符号秩和检验
E. 两样本比较的秩和检验

秩和检验中,秩和T与P的关系

A. T落在界值范围内,则P小于相应概率
B. T落在界值范围内,则P大于相应概率
C. T落在界值范围外,则P 大于相应概率
D. T落在界值范围上,则P 大于相应概率
E. T落在界值范围上,则P 小于相应概率

秩和检验与t检验相比,其优点是

A. 计算简便,应用范围广,不受分布的限制
B. 计算公式更加合理
C. 检验效能更高
D. 抽样误差更小
E. 所需样本量更小

Naomi: Well, it’s called a “self-help book”. It teaches you how to (1) _____ goals and achieve them.Hector : That sounds interesting. What does it say?Naomi: It says here “It is becoming more and more difficult to get a good job and make enough money. To be (2) _ in life, you need to set goals.”Mateo: That makes (3) _. Goals give your life a sense of direction.Naomi: That’s right! “First you need to (4) _ your goal. Then you need to make a plan for achieving your goal.”Hector: Could you explain that a little more?Naomi: You can’t just cross your fingers and say “I hope my dreams come true.” You have to make a plan that goes (5) _ by step. My dream, for example, is to be a graphic artist. So first I have to go to art school. Then I’ll get a(n) (6) _____. That’s my plan for the next three years.Mateo: That sounds like a good plan.