质量控制经理希望通过配合度测试来判断新批灯泡是否符合公司的耐用性标准，该标准规定了20%的寿命少于1年，50%的寿命1到3年，30%超过3年。经理会挑选200个灯泡，观察50个灯泡寿命少于1年，100盏灯泡寿命1到3年，50盏灯泡寿命超过3年。 Observed Expected (Observed - Expected)2 /Expected <1 year 50 40 2.5 1-3 years 100 100 0 >3 years  50 60 1.67   What is the observed value of the test statistic?单项选择题

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They calculate the adjusted residuals with the output shown below. What does this indicate?            bunnyland   otherland  wilderness   doggie  3.40249826  0.04766563 -3.35278341   kevin  -3.40249826 -0.04766563  3.35278341

What type of statistical test is most often used for categorical data?

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对于哪种类型的数据，我们使用卡方检验？

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