STATS 2B03 Lecture Notes - Lecture 2: Railways Act 1921
24 Jan 2016
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Example: 55, 63, 72, 41, 87, 75, 64, 60. Cumulative frequency is useful in larger data sets as it can show you that 5 people got less than. Convention: when the class boundaries overlap the right class boundary is not included in the interval (it ends up being 80-89 essentially) you could say 80-89, but if you start using decimals it can get messy. Example: 55, 63, 72, 41, 87, 75, 64, The first column shows the first number (4 in 40, 5 in 50) The second column only shows the ones (1 in 41, 5 in 55: the numbers from the data set example. The bracket is put next to the row that corresponds to the calculated median. Definition if n is odd, and the average of the middle two values if n is even. Median: the median of an ordered data set with n observations is the middle value of.
