SOCC31H3 Lecture : SOCB06 lec 2.docx
Document Summary
Same number of men and women, compare n say that the number is the same for both sexes. When distribution is being compared and are equal in size. The frequency data can be used when equal. The frequency data cant be used to make compatisons bw groups. Proportion # of cases compared to the total size pf distribution. Most prefer % to show in relative size. One-way commuting distances for miles for 60 workers in downtown dallas. 6: specify the # of class intervals, when all intervals are to be the same width, the following rule may be used to find the required class inteeval width. 10 w = (l-s)/k where w-cass width, l=the largest data, s= the smallest data, k=number of classes example: suppose the age of a sample of 10 students. 20, 18, 18, 21, 19, 25, 22, 23, 22 we select k=4, w= (25-18)/4 = 1. 75 which is rounded up to 2.
