STAB22H3 Lecture 11: stab22_Lecture11.pdf
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STAB22H3 Full Course Notes
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The goal of inference is to compare the responses in two groups. Each group is considered to be a sample from a distinct population. The responses in each group are independent of those in the other group. We take two independent samples from these populations: Population sample size sample mean sample standard deviation. Example: a fourth-grade class has 12 girls and 8 boys. Based on information from the national health and nutrition examination survey: The heights (in inches) of 10-year-old girls are distributed normally with mean 56. 4 and standard deviation 2. 7 and. The heights (in inches) of 10-year-old boys are distributed normally with mean 55. 7 and standard deviation 3. 8. Assume that the heights of the students in the class are random samples from the populations. Suppose that is the mean of an srs of size drawn from population and that is the mean of an srs of size drawn from population.