11/6/2022 0 Comments Rf online europe 1.5![]() ![]() ![]() What happens to the mean and median if we add or multiply each observation in a data set by a constant?Ĭonsider for example if an instructor curves an exam by adding five points to each student’s score. We will discuss methods using the median in Lesson 11. ![]() For example, use the sample median to estimate the population median. Unless data points are known mistakes, one should not remove them from the data set! One should keep the extreme points and use more resistant measures. However, we need to be aware of one of its shortcomings, which is that it is easily affected by extreme values. In future lessons, we talk about mainly about the mean. The mean is a sensitive measure (or sensitive statistic) and the median is a resistant measure (or resistant statistic).Īfter reading this lesson you should know that there are quite a few options when one wants to describe central tendency. Therefore the median is not that affected by the extreme value 9. The medians of the two sets are not that different. The data set (with 91 coded as 9) in increasing order is: Let us see the effect of the mistake on the median value. The mean would be 73.9, which is very different from 82.1. *Please be sure to activate and update your RF9.5 online to receive the latest versions of these aircraft.The mean would be \(\bar(9 78 69 95 82 76 76 86 88 80)=73.9\)
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