Questions tagged [mean]

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IoU when labels are different

The IoU focuses only on the bounding boxes. My predictions for one Image are (Yolo) e.g. label x y w h 0 0.1 0.2 0.3 0.3 1 0.9 0.9 0.05 0.05 And my ground truth is: label x y w h 1 0.1 0.2 0.3 0....
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19 views

Combination of groupby and mean methods

I am looking at the below csv file : We have the question : Display the mean of the variable gre by group of admitted/not admitted students, using the combination of groupby and mean methods. I would ...
• 101
140 views

What should the target variable (y) look like here?

I am doing some data science problems for practice, and this is the question I'm currently tackling: Given a list of L values generated independently by some unknown process, we will use the mean of L ...
• 308
103 views

Why mean and median are similar for well distributed dataset?

I've read that when considering well distributed variables, median and mean tend to be similar, but can't figure out why mathematically this is the case.
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34 views

Sampling a data based on average and variance of another data

I have a set of textual datasets that have the following average and variance tokens lengths: ...
• 252
32 views

Compare standard deviations in different samples?

I have some data which you can group based on different variables. I know how to test if they have significantly different means. But what the deviation inside the samples?
• 189
272 views

Find variance from 2 variances of 2 datasets with difference sizes

In an attempt to find the mean number of hours his tutorial classmates spent per day preparing for tutorials, John collected data from 10 of his friends in the tutorial group and found that the mean ...
• 11
96 views

dividing Mean by standard Deviation meaning

I have played around with logistic regression a little using movement data intervals that are prelabeled as either resting or active. I now found that if I divide the mean movement of the individual ...
38 views

mean and variance of a dataset

I have a simple question. Please see the below screenshot : It is from a midterm exam from a university : https://cedar.buffalo.edu/~srihari/CSE555/exams/midterm-solution-2006.pdf My questions is how ...
• 221
4k views

finding the mean for each of the channels (RGB) across an array of images [closed]

How can I find the mean for each of the channels (RGB) across an array of images? For example train_dataset[0]['image'].shape is ...
• 113
120 views

Mean of mean and average [closed]

In order to establish an overall rating for a product from a series of user ratings (from 1 to 5), I thought that the median would be a good idea so that extreme values would not have too much ...
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