质量工程师考试（模拟考试下午题）7(1)

标签：质量工程师考试真题,质量工程师考试试题,http://www.gaofen123.com 质量工程师考试（模拟考试下午题）7(1),
1．用散点图判断y与x为（      ） 
        a.相关        b.不相关        c.非线性相关    d.弱相关 
      2．回归方程式为（     ） 
         a: =13.96+12.55x                b: =13.96-12.55x 
         c: 1.396+12.55x                 d:1.396-12.55x 
      3.相关系数r（      ） 
         a:1                b:0              c:-0.999            d:0.999 
    （五）对某加工工艺进行环保试验，在生产中产生的有害物质重量y（单位：克）与它的燃料消耗量x（单位：千克） 
之间存在某种相关关系。试验测量得数据如下表： 
    x          289                 298            316            327            329          329             331            350 
    y          43．5          42．9          42．1          39．1          38．5          38．0          38．0          37．0 
    1．回归方程为：(     ) 
     a: =79.3+0.123x                      b: =7.937+0.123x 
     c: =7.937+0.123x                     d: =79.37-0.123 
    2．统计量f为              ) 

第 1 页 www.gaofen123.com         a:6.24            b:-6.24            c:62.4                 d:-62.4 
    3．xo=340时，yo的概率为95%的预测区间为(      )  /

        a:[3.54,3.96]  b:[35.4,39.69]      c:[3.54,39.69]      d:[35.41,36.96] 
    （六）对批量为2000的某产品，采用aql=1.01%, 检验水平为ii的一次正常检验，最近持续15批的检验记录如下表：
(lr=9) 
批号          抽 检 方 案          检 验 结 果 
          n          n          ac          re          不合格品数          批合格与否          结论 
21          2000          125          3          4          1          合格          接收 
22                                                     0                      
23                                                     2                      
24                                                     1                      

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