假如学生测验成绩记录为优、良、及格和不及格,为了说明全班同学测验成绩的水平高低,其集中趋势的测度()。A、可以采用算术平均数B、可以采用众数或中位数C、只能采用众数D、只能采用四分位数
假如学生测验成绩记录为优、良、及格和不及格,为了说明全班同学测验成绩的水平高低,其集中趋势的测度()。
- A、可以采用算术平均数
- B、可以采用众数或中位数
- C、只能采用众数
- D、只能采用四分位数
相关考题:
某班学生不到50人,在一次考试中,有1/7人得优,1/3人得良,1/2人及格,其余的均不及格,那么不及格 某班学生不到50人,在一次考试中,有1/7人得优,1/3人得良,1/2人及格,其余的均不及格,那么不及格的人数是 。A.1 B.2 C.3 D.4
【程序说明】从键盘输入学生的学号,在“成绩”表中计算该生的平均成绩,并说明成绩的档次(优、良、中、及格和不及格),如果该生不在表中则提示相应的信息。【程序】SET TALK OFFCLEARUSE 成绩ACCEPT“请输入学生的学号:” TO XH(1)IF (2)?“查无此人!”ELSE(3) 成绩TO CJ FOR 学号=XHDO CASECASE CJ>=90DC=“优”CASE CJ>=80DC=“良”CASE CJ>=70DC=“中”CASE CJ>=60DC=“及格”(4)DC=“不及格”ENDCASE? XH,CJ,DCENDIFUSESET TALK ON(1)A.LOCATE TO 学号= XHB.LOCATE OF 学号=XHC.LOCATE FOR 学号=XHD.INDEX ON 学号=XH
已知x代表某个百分制成绩,下列程序段用于显示对应的五级制成绩,正确的是( )A.If x>=60 Then Print"及格" Else If x>=70 Then Print"中" Else If x>=80 Then Print"良" Else If x>=90 Then Print"优" Else Print"不及格" End IfB.If x<90 Then Print"良" Else If x<80 Then Print"中" Else If x<70 Then Print"及格" Else If x<60 Then Print"不及格" Else Print"优" End IfC.If x>=90 then Print"优" Else If x>=80 Then Print"良" Else If x>=70 Then Print"中" Else If x>=60 Then Print"及格" Else Print"不及格" End If End SelectD.Select Case x Case x>=90 Print"优" Case x>=80 Print"良" Case x>=70 Print"中" Case x>=60 Print"及格" Case Else Print"不及格"
设学生表当前记录的“计算机”字段值是89,执行以下程序段后,屏幕输出______。DO CASECASE计算机<60?”计算机成绩是:"+"不及格”CASE计算机>=60?"计算机成绩是"+"及格"CASE计算机>=70?"计算机成绩是:"+"中"CASE计算机>=80?”计算机成绩是:"+"良"CASE计算机>=90?"计算机成绩是"+"优"ENDCASEA.计算机成绩是:不及格B.计算机成绩是:及格C.计算机成绩是:良D.计算机成绩是:优
有以下程序段: D0 CASE CASE 计算机60 ?”计算机成绩是:”+”不及格” CASE计算机=60 ?”计算机成绩是:”+”及格” CASE计算机;70 ?”计算机成绩是:”+”中” CASE计算机=80 ?”计算机成绩是:”+”良” CASE计算机=90 ?”计算机成绩是:”+”优” ENDCASE 设学生数据库当前记录的“计算机”字段的值是89,屏幕输出为( )。A.计算机成绩是:不及格B.计算机成绩是:及格C.计算机成绩是:良D.计算机成绩是:优
设在SQL Server 2008某数据库中有表SC(Sn0,Cn0,Grade),其中Grade列的类型为int。若在查询成绩时,希望将成绩按“优”、“良”、“中”、“及格”和“不及格”形式显示,则下列Case函数中正确的是( )。A.Case GradeWhen Grade between 90 and 100 THEN Grade=ˊ优ˊWhen Grade between 80 and 89 THEN Grade=ˊ良ˊWhen Grade between 70 and 79 THEN Grade=ˊ由ˊWhen Grade between 60 and 69 THEN Grade=ˊ及格ˊElse Grade=ˊ不及格ˊEndB.Case GradeWhen Grade between 90 and 100 THEN ˊ优ˊWhen Grade between 80 and 89 THEN ˊ良ˊWhen Grade between 70 and 79 THENˊ中ˊWhen Grade between 60 and 69 THENˊ及格ˊElseˊ不及格ˊEndC.CaseWhen Grade between 90 and 100 THEN Grade=ˊ优ˊWhen Grade between 80 and 89 THEN Grade=ˊ良ˊWhen Grade between 70 and 79 THEN Grade=ˊ由ˊWhen Grade between 60 and 69 THEN Grade=ˊ及格ˊElse Grade=ˊ不及格ˊEndD.CaseWhen Grade between 90 and 100 THENˊ优ˊWhen Grade between 80 and 89 THEN ˊ良ˊWhen Grade between 70 and 79 THEN ˊ由ˊWhen Grade between 60 and 69 THEN ˊ及格ˊElseˊ不及格ˊEnd
设SC表中记录成绩的列为:Grade,类型为int。若在查询成绩时,希望将成绩按‘优’、‘良’、‘中’、‘及格’和‘不及格’形式显示,正确的Case函数是()。A Case Grade When 90~100 THEN ’优’ When 80~89 THEN ’良’ When 70~79 THEN ’中’ When 60~69 THEN ’及格’ Else ’不及格’ EndB Case When Grade between 90 and 100 THEN Grade = ’优’ When Grade between 80 and 89 THEN Grade = ’良’ When Grade between 70 and 79 THEN Grade = ’中’ When Grade between 60 and 69 THEN Grade = ’及格’ Else Grade = ’不及格’ EndC Case When Grade between 90 and 100 THEN ’优’ When Grade between 80 and 89 THEN ’良’ When Grade between 70 and 79 THEN ’中’ When Grade between 60 and 69 THEN ’及格’ Else ’不及格’ EndDCase Grade When 90~100 THEN Grade = ’优’ When 80~89 THEN Grade = ’良’ When 70~79 THEN Grade = ’中’ When 60~69 THEN Grade = ’及格’ Else Grade = ’不及格’ End
“学生考试成绩分为优、良、中、及格、不及格”和“学生补考成绩分为及格和不及格”这一对陈述,其中的“及格”与“不及格”两个概念之间().A、都是矛盾关系B、都是反对关系C、前者是矛盾关系,后者是反对关系D、前者是反对关系,后者是矛盾关系
单选题假如学生考试成绩以“优”.“良”.“及格”和“不及格”来记录,为了说明全班同学考试成绩的水平高低,其集中趋势的测度()A可采用算术平均数B可以采用众数或中位数C只能采用众数D只能采用四分位数
单选题设SC表中记录成绩的列为:Grade,类型为int。若在查询成绩时,希望将成绩按‘优’、‘良’、‘中’、‘及格’和‘不及格’形式显示,正确的Case函数是()。A Case Grade When 90~100 THEN ’优’ When 80~89 THEN ’良’ When 70~79 THEN ’中’ When 60~69 THEN ’及格’ Else ’不及格’ EndB Case When Grade between 90 and 100 THEN Grade = ’优’ When Grade between 80 and 89 THEN Grade = ’良’ When Grade between 70 and 79 THEN Grade = ’中’ When Grade between 60 and 69 THEN Grade = ’及格’ Else Grade = ’不及格’ EndC Case When Grade between 90 and 100 THEN ’优’ When Grade between 80 and 89 THEN ’良’ When Grade between 70 and 79 THEN ’中’ When Grade between 60 and 69 THEN ’及格’ Else ’不及格’ EndDCase Grade When 90~100 THEN Grade = ’优’ When 80~89 THEN Grade = ’良’ When 70~79 THEN Grade = ’中’ When 60~69 THEN Grade = ’及格’ Else Grade = ’不及格’ End
单选题“学生考试成绩分为优、良、中、及格、不及格”和“学生补考成绩分为及格和不及格”这一对陈述,其中的“及格”与“不及格”两个概念之间().A都是矛盾关系B都是反对关系C前者是矛盾关系,后者是反对关系D前者是反对关系,后者是矛盾关系