In the paper "The Relation of Sex and Sense of Direction to Spatial Orientation in an Unfamiliar Environment" (Journal of Environmental Psychology, Vol. 20, pp. 17-28), J. Sholl et al. published the results of examining the sense of direction of 30 male and 30 female students. After being taken to an unfamiliar wooded park, the students were given some spatial orientation tests, including pointing to south, which tested their absolute frame of reference. The students pointed by moving a pointer attached to a 360◦ protractor. Following are the absolute pointing errors, in degrees, of the participants.
At the 1% significance level, do the data provide sufficient evidence to conclude that, on average, males Have a better sense of direction and, in particular, a better frame of reference than females? (Note: . x1 = 37.6, s1 = 38.5, . x2 = 55.8, and s2 = 48.3.)
Answer to relevant QuestionsV. Tangpricha et al. did a study to determine whether fortifying orange juice with Vitamin D would result in changes in the blood levels of five biochemical variables. One of those variables was the concentration of ...Refer to Exercise 10.40 and obtain a 98% confidence interval for the difference between the mean absolute pointing errors for males and females. The paper "Correlations Between the Intrauterine Metabolic Environment and Blood Pressure in Adolescent Offspring of Diabetic Mothers" (Journal of Pediatrics, Vol. 136, Issue 5, pp. 587-592) by N. Cho et al. presented ...Identify the assumption for using the two-means z-test and the two-means z-interval procedure that renders those procedures generally impractical. x1 = 20, s1 = 6, n1 = 20, . x2 = 24, s2 = 2, n2 = 15 a. Left-tailed test, α = 0.05 b. 90% confidence interval We have provided summary statistics for independent simple random samples from two populations. In each case, ...
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