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?Single choice
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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?
In the Pulse Data (Pulse.xlsx Download Pulse.xlsx ), individuals are randomly allocated to the group where they run and the group where they rest pulse1 - each participants pulse rate at the start pulse2 - each participants pulse rate after their 'treatment', our outcome variable ran - our treatment variable with 1 for those that ran and 2 for those that rested smokes - identifies regular smokers with 1 = yes and 2 = no sex - 1 = male, 2 = female height - in cms weight - in kgs activity - usual activity level from 1 = slight, 2 = moderate, 3 = high We can use our Chi-Squared Test of Association to check for evidence of an association between a participant's activity level and their smoking status. Based on your p-value you would
对于哪种类型的数据，我们使用卡方检验？
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