Psy 270 Week 4 Paper

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For the following scores, find the (a) mean, (b) median, (c) sum of squared deviations, (d) variance, and ( e ) standard devation: 2, 2, 0, 5, 1, 4, 1, 3, 0, 0, 1, 4, 4, 0, 1, 4, 3, 4, 2, 1, 0 a) Mean = (2+2+0+…..+1+0)/21 = 42/21= 2 Mean = 2 b) Ordered data is: 0,0,0,0,0,1,1,1,1,1,2,2,2,3,3,4,4,4,4,4,5 Median = 2 c) Sum of squared deviations =SS= (2-2)2+(2-2)2+…..+ (0-2)2 =20+5+2+20+9=56 SS= 56 d) Variance = SS/N= 56/21=8/3 Variance = 8/3 e) Standard deviation = SD = 1.633 SD = 1.633 In a study by Gonzaga et al. (2001), romantic couples answered questions about how much they loved their partner and also were videotaped while revealing something about themselves to their partner. The videotapes were later rater by trained judges…show more content…
For the verbal ability test, the mean for people in general is 50 and the standard deviation is 20. For the quantitative ability test, the mean for people in general is 0 and the standard deviation is 5. Which is this person’s stronger ability: verbal or quantitative? Explain your answer to a person who has never had a course in statistics. z-score for verbal ability is (81-50)/20 = 1.55 z-score for quantitative ability is (6.4-0)/5=1.28 This person has a strong ability on verbal , this person is more above the average in verbal ability than the average in quantitative ability You are conducting a survey at a college with 800 students, 50 faculty members, and 150 administrators. Each of these 1,000 individuals has a single listing in the campus phone directory. Suppose you were to cut up the directory and pull out one listing at random to contact. What is the probability it would be (a) a student, (b) a faculty member, (c) an administrator, (d) a faculty member or administrator,

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