Cumulative Frequency Polygon Median. Did you know there are so many daily things in your life that are made easy and exciting by statistics. If you have n numbers in a group the median is the n 12 th value.
Oct 09 2016 When divided by 2 it becomes 325 which is in-between the first and second set of cumulative frequency data hence the median is between 10 and 20. Remember a median is the middle value which means that half of the temperatures are greater than or equal to the median and half are less than or equal to the median. In the example you have a group of runners who.
Cumulative Frequency Polygon can be used to calculate median quartiles deciles and percentiles etc.
Similarly the cumulative frequency of interval 10-20 is 6 because it is the sum of 2 previous frequency 4 current frequency and the cumulative frequency of interval 20-30 is 11 because it is the sum of 2 4 previous frequency 5 current frequency. Remember a median is the middle value which means that half of the temperatures are greater than or equal to the median and half are less than or equal to the median. Without statistics you wouldnt have all the stats on your favourite football payer or track your progress in your exams or have weather forecasts etc. In this section we also look at the idea of quartiles the interquartile range and the semiinterquartile range.
