2017年3月23日 · Keeping in mind the rules, in this boxplot the median falls to the right of the center of the box, thus its distribution is negatively skewed. But I also can see that the right line is larger than the left line, thus "according to the rules" the distribution is positively skewed. How do I know the real skewness. Thanks in advance.

2018年9月8日 · Students age group is 2-9. There are more students with age 6-7 & 7-8.5. The average student age is 7. Since each group (Least-Q1, Q1-Q2, Q2-Q3 & Q3-Greatest) in box and whisker plot is roughly equally divided; thus the smallest looking group would be …

2014年6月1日 · A boxplot illustrates the range and the interquartile range (IQR), both of which are measures of the variation in a data set.

2016年4月22日 · I am drawing a box plot for a question where the data set is the bulb life time(in hours) My 5 number summary is Q1 : 208.25 Q2 : 297 Q3 : 376.5 min : 172 max : 1020 IQR : 168.25 3/2 * IQR :...

2019年9月21日 · Normally, boxplots show the sample median (cross-bar inside the box), but not the mean. Sometimes, you can guess the value of the sample mean, but that can be difficult because (other than outliers) exact positions of only five points at most are shown in a boxplot.

2019年9月10日 · I made a first version calculating skewness using central moments but this seems to yield some strange behaviour: The skewness changes direction temporarily and flips back and forth when 2 pressure points pass each other. I recorded a GIF of a simulation that shows the problem I'm talking about.

2013年8月10日 · This is a bit off-topic but I can't help thinking about the reason behind naming box-and-whisker plot. "Whisker" according to dictionary is "any of the long stiff hairs that grow near the mouth of a cat, mouse, etc." To me it seems very irrelevant. Why the word "whisker" chose for this particular type of plot.

2014年6月10日 · Then Box-Cox is probably the first thing to try, but the data should be positive-valued. Also, you cannot fix both skew and kurtosis with these, only skew. In fact, I wouldn't rely on skew alone, but make histograms of your transformed variables.

2015年11月21日 · How to draw a stem and leaf plot for the following large data, the data is for different EU states so there is a large difference between the data. I have to plot stem and leaf for each table i.e. area, population as well as size of motorway.

Given two sets of random numbers, is it possible to say that one set of random numbers has a greater degree of randomness when compared to the other?