HESA 6505 Lecture Notes - Lecture 9: Probability Distribution, Medes, Test Statistic
5 Dec 2017
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Numerical variable categorical variable with two variables: t-test. Numerical variable categorical variable with more than two variables: Categorical variable with two values categorical variable with two values: z-test. To obtain the expected frequency for obese females, multiply the average proportion of obese adults (p) by the total number of females. If we do not reject the null, we say we do not have sufficient evidence to support that the two proportions are different at alpha = 0. 05. Used when the null hypothesis of equal proportions is rejected. Enables you to make comparisons between all pairs. Start with the observed differences, pj - pj", for all pairs (for j cannot equal j") then compare absolute difference to a calculated critical range. A university is thinking of switching to a trimester academic calendar. A random sample of 100 administrators, 50 students, and 50 faculty members were surveyed.
