STP 231 Lecture Notes - Lecture 4: Rare Disease, Crown Group, Quartile
2 Sep 2015
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The subject had a rare disease which he/she didn"t report. Distribution: uniform, bell shaped, symmetric, mean, find the sum of all the numbers in the data set, the divide that sum by the amount of numbers in the the data set, ex. (32+55+56+58+62+63+65+67+75+76+2(77)+78+79+82+83+85+87+94+120)/20. = 73. 55: median, middle of ordered data, position= n+1/2, n= the number of data in the data set, ex. 20+1/2= 10. 5: therefore, the median would be found between the 10th and 11th number in the data set, to find the mean you would have to add the 10th and 11th number and divide by two, ex. 76+77/2= 76. 5: median- 76. 5, with odd number data sets, the median is the middle data point. Quartiles: quartile 1, the median of the lower data, ex. 113, 124, 124, 132, 146, 151, 170: quartile 3, the median of the upper data, ex. 113, 124, 124, 132, 146, 151, 170: interquartile range, q1-q3= iqr.
