M1.6 Understand the terms mean, mode – and median Tutorials Learners may be tested on their ability to: calculate or compare the mean, median and mode of a set of data, e.g. height/mass/size of a group of organisms. Mean, median and mode The mean, median and mode are all measures of central tendency and act as representative values for the whole data set. The mean, usually denoted as x bar (), has already been mentioned in section M1.2 and is the sum of the data values divided by the number of data values. Mean The median is the middle value of a data set and is usually denoted by Q2. Formally the middle value is the (n+1)/2th piece of data where n is the number of pieces of data. Median Q2 = th Finally, the mode is the easiest to spot as it is the most frequently occurring value. Mode Most frequent For example, take this set of data values: 25,24,27,28,19,31,25,31
M1.6 – Understand the terms mean, mode and median Tutorials Learners may be tested on their ability to: calculate or compare the mean, median and mode of a set of data, e.g. height/mass/size of a group of organisms. Mean, median and mode The mean, median and mode are all measures of central tendency and act as representative values for the whole data set. The mean, usually denoted as x bar (), has already been mentioned in section M1.2 and is the sum of the data values divided by the number of data values. Mean The median is the middle value of a data set and is usually denoted by Q2. Formally the middle value is the (n+1)/2th piece of data where n is the number of pieces of data. Median Q2 = th Finally, the mode is the easiest to spot as it is the most frequently occurring value. Mode Most frequent For example, take this set of data values: 25,24,27,28,19,31,25,31
418582-m1.6-tutorial.docx