Consider the four sets of scores: a) 8, 8, 8, 8, 8 ...

     1.   Consider the four sets of scores: a) 8, 8, 8, 8, 8 b) 6, 6, 8, 10, 10 c) 4,   6, 8, 10, 12 d) 1004, 1006, 1008, 1010, 1012 1) Upon inspection, which   show(s) the least variability? The most variability? 2) For each set of   scores, compute the mean; compute the variance and standard deviation   directly from the deviation scores. 3) What do the results of 5-2 suggest   about the relationship between central tendency and variability? 

2. Indicate   the probable shape of each of the following distributions: a) Heights of a   large sample of 25-year-olds b) Scores on the same math test taken by 30   fifth graders and 30 ninth graders (combined into a single frequency   distribution_ c) Verbal aptitude of high school students d) SAT scores for   students admitted toa very selective university e) Age of freshman in   American universities f) Alcohol consumption in a sample of 16-year-olds   (number of drinks per week)