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Questions tagged [boxplot]

A graphical display to summarize the distribution of a sample. It displays five numbers plus (possibly) some outliers - those five points being the median, hinges (approximate quartiles), and the largest and smallest value not counting any points marked as outliers.

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28 views

Box and Whisker plot - dots over the box

I have a box and whisker plot, and I am unable to understand the meaning of the dots over the box. In the following example, I understand that outliers are the data points which do not "fit" ...
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17 views

Creating box plots from a count (or frequency) table

I have a census data where the number of population at each age is indicated and I am trying to create a box plot for the age of the entire population. At first I tried to repeat the 'age' by the ...
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54 views

How to name and treat such a distribution of extreme values / outliers?

In this sample data I have 4600 teenagers with their telephone calling frequency per week. Most of them are "normal" (max 5) but some are extreme with up to 75 calls per week. I learned to ...
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41 views

What does the "mass" of a box plot mean?

By “mass” I mean the size of the two subretangles that make up the box in a standard box plot. I thought the mass quantified the observations below and above the median but if it did so every box plot ...
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1answer
61 views

why does ggplot show outliers but no whiskers?

I created the following plot in R (ggplot2). But I don't know how to interpret the third boxplot. From the documentation: 'The upper whisker extends from the hinge to the largest value no further than ...
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1answer
58 views

What does it mean if there are values outside the bounds of confidence interval?

My apologies if this is too basic, I am beginner in this. I have computed the following results where the highlighted region represents the rolling confidence interval using mean and standard ...
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9 views

kruskal-wallis and boxplots interpretation

This is an example. Let's say in my investigation I am collecting online text data. I have a software that automatically collects text according to specific categories. I have to select the best ...
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1answer
12 views

Maximum possible outliers for a Box-Whisker-Plot

I am aware of the definition for outliers in a Box-Whisker-Plot: 𝑞1−𝑘×IQR 𝑞3+𝑘×IQR with IQR := 𝑞3−𝑞1 The question at hand is: (Maximum) How many outliers are possible in a Box-Whisker-Plot for ...
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84 views

Alternative to boxplot when there are many outliers

I have a distribution than has an extremely wide range but has a gaussian shaped narrow peak inside of it. If I plot this data with boxplots I get a small box with small whiskers and many outliers of ...
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1answer
58 views

layman's interpretation of a boxplot

Is it wrong to conclude from the following boxplot that a passenger is more likely to experience flight delays on Thursdays and Fridays? If so, why? Note: negative delays mean early departure. Image ...
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43 views

Visualising Gantt chart distribution

I perform $n$ simulations of operations planning. I can plot a gantt chart for each simulation, but I am interested in visualising the variability of the whole simulation set : I want a Gantt ...
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1answer
19 views

Remove dependency from a dependent variable

I am tasked with doing some exploratory data analysis on the Diamond dataset from the library(Ecdat) in R. The assignment states:...
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12 views

How can I use Boxplots to find patterns in each box data?

I have represented my dataset in Boxplot 1 in order to check if there is patterns in meals consumption within each age group. What I can see, is that there is a kind of patterns in each age group, ...
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44 views

Alternative for boxplot with log-x scale

I am analyzing the behavior of a distribution with a logarithmic x-scale on a pretty large range. Initially, I thought using boxplots might be a good idea to understand how the data behaved, but now I ...
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1answer
76 views

How to plot a box plot that accounts for the effect of another factor?

I am analyzing the effect of sampling month (5 different months), sampling time (day/night) and sampling location (5 different sites) on the effect of species richness using a linear model in R. All ...
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1answer
41 views

Analyse relationship between categorical feature vs continuous target

In a regression problem, I am trying to analyse the relationship between categorical predictors vs continuous target variable, therefore I opted for plotting with a box plot, but can not infer ...
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54 views

Determining scale issues covariance

Background for Question A tibble: 6 x 4 This was given to us. I produced a bivariate/matrix scatterplot using pairs command and got the following (as well as a boxplot): QUESTION: Could scale be an ...
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1answer
32 views

p value for monthly trend

I have a distribution of values for each of 12 months. When I draw the boxplots (one boxplot for each month) the median gradually increases, but the boxes overlap. Which test do I have to use in order ...
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73 views

How do I report box-plots for k-fold data?

I'm working on a keypoint detection task and I am plotting a boxplot (25th-75th percentile = box) showing the error (i.e. distance) between the predicted keypoint and actual keypoint. I've gotten the ...
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46 views

Perform linear regression after box plot. Is that possible?

I am currently investigating a dataset with a visible linear relationship between the considered variable (Look at the red dots in the figure). However, the linear regression results are not good due ...
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17 views

3d plot superstore data [duplicate]

How to make out of the below dataset a very meaningful/insightful 3D Plot. I mean, which variables you will pick up, plus, which 3D plot you will choose? Also, if you can add the same for the boxplot.
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41 views

negative skew and positive medcouple

I have below case where I see contradicting medcouple and skewness value : Now, from the box plot, it is clear that the data has negative skewness but the medcouple shows slight positive skewness. Am ...
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113 views

R: remove outliers from boxplot or qq-plot?

I am running a regression model, and I need to delete outliers. However, when I ran a boxplot, it asked me to delete at least 100 datas (I only have 700 datas in total). Both y and x variables are ...
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1answer
119 views

can somebody explain what a medcouple is?

what is a medcouple? i understand that it is the median of a couple of data points but it is not clear to me what these pairs of data actually are. e.g. https://wis.kuleuven.be/stat/robust/papers/2008/...
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1answer
183 views

How can I use the box plot to explain the Empirical Rule for a normal distribution?

I am wondering if I can use the box plot to explain the Empirical Rule for a normal.distribution. I don't know if the Empirical Rule can be explaines using the box plot or not, but I just looked at ...
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28 views

Boxplot giving only points and no boxes [closed]

I have plotted two boxplots side by side from two different datasets in the same plot. I made some transformations first they had different number of observations. ...
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1answer
2k views

What is the defintion of variation in a box plot?

Variation is a term I have always been confused with. The first time I heard it, it was defined as "the different between the max and min values in a distribution". Lately, I've been hearing ...
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36 views

What action to do after visualizing box plot of variables of a dataset

I have a dataset that contains 23 features, these features model the web traffic of two protocoles. Some features are extracted and the other are statistically calculated features. I want to build a ...
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1answer
28 views

determine the value of the mean using whisker plot

how can i determine the mean using box plot? also can we know which series has the highest mean value ?
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3k views

Figuring out skewness from a boxplot

How do you define the skewness in this case? My understanding is exactly the opposite from what I have read. What I have read As the box plot is towards the lower end it is rightly skewed. and it will ...
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16 views

How are notches calculated for boxplots that represent non-parametric data?

I was interested in finding the theory behind the formula used to calculate where notches are to be placed in a boxplot to signify 95% confidence interval, which is median +/- 1.57*IQR/sqrt(n). An ...
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40 views

Formal Statistical Test Equivalent to Comparing Box Plots

I have a data set consisting of a continuous feature compared to a discrete, categorical feature. Currently, I have generated a stacked box plot for each dependent category comparing the values of ...
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73 views

How to explain a Box Plot?

Assuming that I'm able to augment their knowledge about boxplot I can give the below insights for box plot ...
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1answer
30 views

arrows on whiskers of box plots

I plotted box plots for a dataset of >20 million rows. The whiskers came out with little arrows pointing towards the boxes: What do they mean?
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3answers
699 views

Significant effect with overlapping boxplots?

I'm puzzled about some of the results that I got, after plotting the data. I have a dataset where 38 participants are tested on three conditions "time" and are thus tested three times. I figured this ...
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36 views

Boxplot without top whisker

I'm having some questions and hope some one could help me with them. When I plot the data into a boxplot, there is no top whisker but lots of outliers which is above the upper bound. As I'm looking ...
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1answer
451 views

Tukey depth intuition

In a bagplot, the inner polygon, called the bag, is constructed using the Tukey depth. What is the intuition of Tukey depth and how is it calculated? A simple two-dimensional example with ten to ...
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1answer
37 views

Visually, how strong would you rate the association between this nominal predictor variable and continuous response variable?

I've yet to find an easy-to-understand and easy-to-implement way to statistically model the strength of association between nominal data and continuous data. So I'm trying to get a rough idea visually ...
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46 views

Repeated measures anova in R: comparing each month against itself across a ten year period

I am an R novice and trying to perform a repeated measures anova to compare each month against the same month across all 10 years (e.g. Jan 2010, Jan 2011, Jan 2012 and so on... for each month). And ...
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1answer
106 views

a box-and-whisker plot for the difference between two independent groups

I'm trying to plot a box-and-whisker plot for differences between samples obtained from two different (and presumably independent) groups (the sample numbers may differ between the groups). Because ...
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1answer
124 views

How to make inference based on a box-plot? [closed]

1) Write a comment about age comparing the box-plots at two levels of treatment compliance levels. 2) What are the interquartile ranges of BMI for comparing these two levels of treatment compliance ...
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1answer
773 views

Method to determine outliers with a skewed dataset [duplicate]

How can we find outliers in a dataset with a (highly) skewed distribution? With a normal distribution, is it well documented to use 2 x Standard Deviation or the upper boundary of the box plot (1.5 x ...
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1answer
346 views

How to visualize 10-fold cross-validation results?

I want to visually compare the 10-fold cross-validation results of two models. (Note that the data are paired, as both models are fit to the same folds and tested against the same held out fold on ...
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576 views

Problems with boxplots and many zeros

I am having a problem making box plots in R. I have several datasets which measure the vocalization of a species (in "Detection Positive Minutes", the number of times a cetacean was calling per hour) ...
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1answer
79 views

Interpreting a boxplot with outliers [closed]

I have this specific boxplot that I would like to interpret in my conclusion for my master thesis. I noticed that the most right box does not have any outliers, but a very broad Q2 and Q3 range. Also ...
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414 views

Interpretation of boxplot overlaps

Let's assume that I have the boxplot below that shows fraction of hits for a query. I'm trying to understand if there are any meaningful differences for each type (x,y) and for each category (A-D). ...
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289 views

Comparing boxplots with different sample size

Let's suppose somebody did an experimented to measure how high a plant can grow on different soils. The experiment has been repeated different times for the different soils, with some soils having e.g....
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2answers
90 views

Why do box-and-whisker plots use interquartile range, when it deliberately ignores everything below the 25% percentile and above the 75% percentile?

Why ought IQRs, and anything that relies on them like boxplots, be used when they ignore data? I replicated Wikipedia's graphs.
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2k views

Missing quartile in boxplot

Currently I am creating a box plot. I am new on the field of statistics and especially box plots. Find the picture following: On the y-axis find the number of messages. I have problems understanding ...
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1answer
25 views

Plotting series of numbers while protecting privacy

I have 2 series of numbers e.g x=[1,3,4,6,9] y=[100,179,210,400,650]. I want to plot them and show that plot in a manuscript. However, these numbers represent some private information and hence I don'...

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