Chapter 18 - Hypothesis testing: Means and proportions. In this chapter, the following content will be discussed: Testing hypothesis about a single mean, hypothesis testing about a single mean – step by step, relationship between confidence interval and hypothesis testing,...
Trang 4Single Mean – Step by Step
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Trang 8t ( ) X tsx interval estimate of
Trang 10Ho: all treatments have same effect on mean responses
H1 : At least 2 of 1, 2 r are different
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Trang 11• Betweentreatment variance Variance in the response variable for different treatments.
• Withintreatment variance Variance in the response variable for a given treatment.
• If we can show that ‘‘between’’ variance is significantly larger than the ‘‘within’’ variance, then we can reject the null hypothesis
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Trang 12Observations Sample
mean (Xp)
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Trang 17Hypothesis Testing of Proportions – Example (Contd.)
Trang 19Proportions – Example (contd.)
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Trang 21The Probability Values (pvalue) Approach to Hypothesis Testing (Contd.)
Trang 22Probability –Values Approach to Hypothesis Testing
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