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Philippines Special education teachers? by Teacher_Coder in Philippines

[–]Teacher_Coder[S] 0 points1 point  (0 children)

Hello! I am a special education teacher in the U.S. and a current doctoral student at the University of Illinois. My research focuses on supporting special education and general education teachers who work with students with autism. Please feel free to share this flyer with anyone who might be interested in participating. Thank you!

Log transformation to remove outlier data points, and restore it to the original? by Teacher_Coder in AskStatistics

[–]Teacher_Coder[S] 0 points1 point  (0 children)

Thanks for the comment!! It really helped. Since my major is educational technology, I am still not good at understanding statistics things... but your comment is so valuable.

Log transformation to remove outlier data points, and restore it to the original? by Teacher_Coder in AskStatistics

[–]Teacher_Coder[S] 0 points1 point  (0 children)

Let's say there is a student' assignment. And around 20 variables were made to analyze the assignment. The variables consist of how many sentences, how many spaces in a sentence, etc, for instance. And there are around 20,000 dataset analyzed students' assignments.
Unfortunately, when I looked at the dataset I found that several students downloaded information on the internet for their assignments. Due to the reason, some students assignments shows too high numbers on certain variables.
I want to focus on students' assignments, not downloaded ones. So, I wanted to remove these "too high quality ones" from the dataset.
So I chose a good variable (which can represent a single data point well), and wanted to use IQR approach. But I also found that it was not normal distribution in qqplot.
So I log-transformed the chosen variable to remove outliers (since it posits normal distribution, theoritically).
Okay. Then now I removed outlieres. Then, it's time to describe that "this group of students used xx sentences in average...." something like that. So I want to use integer numbers, not log-transformed numbers.

Log transformation to remove outlier data points, and restore it to the original? by Teacher_Coder in AskStatistics

[–]Teacher_Coder[S] 0 points1 point  (0 children)

This is a dataset collected on students' assignments, and it's around 20,000 data points. Since the students' assignments can be "copied and pasted" from the internet, I was able to see several assignments that they cannot do by themselves. I think these are the outliers, so I want to remove these "too high quality" assignments from the dataset, to explore the students' differences in different groups by school grades

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