Poisons are used to prevent rat damage in sugarcane fields. The U.S. Department of Agriculture is investigating whether the rat poison should be located in the middle of the field or on the outer perimeter. One way to answer this question is to determine where the greater amount of damage occurs. If damage is measured by the proportion of cane stalks that have been damaged by rats, how many stalks from each section of the field should be sampled in order to estimate the true difference between proportions of stalks damaged in the two sections, to within .02 with 95% confidence?
Answer to relevant QuestionsThe F-statistic used for testing H0: σ12 = σ22 against Ha: σ12 < σ22 is F = (s1)2/(s2)2. Refer to Exercise 9.19. The “fear of negative evaluation” (FNE) scores for the 11 bulimic females and 14 females with normal eating habits are reproduced in the table below and saved in the BULIMIA file. The confidence ...A random sample of five pairs of observations was selected, one observation from a population with mean µ1, the other from a population with mean µ2. The data are shown in the following table and saved in the LM9_112 ...Do cocaine abusers have radically different personalities than non-abusing college students? This was one of the questions researched in Psychological Assessment (June 1995). Zuckerman–Kuhlman’s Personality Questionnaire ...In order to compare the means of two populations, independent random samples of 400 observations are selected from each population, with the following results: Sample 1 Sample 2 x̄1 = 5,275 .... x̄2 = 5,240 s1 = 150 ...
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