For the survey of students described in Exercise 1.11, the responses on political ideology had a mean
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For the survey of students described in Exercise 1.11, the responses on political ideology had a mean of 3.18 and standard deviation of 1.72 for the 51 nonvegetarian students and a mean of 2.22 and standard deviation of 0.67 for the 9 vegetarian students. When we use software to compare the means with a significance test, we obtain
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Variances T DF P-value Unequal 2.915 30.9 0.0066 Equal 1.636 58.0 0.1073
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Explain why the results of the two tests differ so much.
What would you conclude about whether the population means are equal?
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Divya Munir
I hold M.Sc and M.Phil degrees in mathematics from CCS University, India and also have a MS degree in information management from Asian institute of technology, Bangkok, Thailand. I have worked at a international school in Bangkok as a IT teacher. Presently, I am working from home as a online Math/Statistics tutor. I have more than 10 years of online tutoring experience. My students have always excelled in their studies.
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