Multiple Regression - Dummy or indicator variables, using Excel output

This video provides an illustration of the use of dummy or indicator variables in a multiple regression model.
It builds on the ideas introduced in Multiple Regression Overview: • Multiple Regression: A...
The data used in this example was also used in the ANOVA video: • Understanding Analysis...
This data is from Statistics New Zealand and is an earlier version of this data: www.stats.govt...
Background links
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Dr Nic Videos about Multiple Regression
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Overview • Multiple Regression: A...
Inference (t-tests and F-test) • Multiple Regression - ...
Dummy Variables (this one)
Interpreting coefficients • Multiple Regression - ...
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Statistical inference in multiple regression: • Multiple Regression - ...
There will be other videos to follow on from this.
See creativemaths.... for all of Dr Nic's videos organised by topic.
#Statistics #DrNicStats
The data used in this video is from Statistics New Zealand and is an earlier version of this data: www.stats.govt...

[@pillslifestylereviews6714]

Perfect explanation as always!

[@DrNic]

Glad you think so!

[@albertorossi6380]

Well done, again!

[@DrNic]

Thanks Alberto - I appreciate the feedback.

[@donnagreene9920]

How would I figure out a problem where I have 12 classes taught by 4 teachers: who to give the 13th class to with data from 3 categories?

[@DrNic]

I'm sorry I'm not sure I understand your question. With 12 classes if you need a dummy variable for each one, you need 11 dummy variables and the 12th one is when all the others are zero.

[@judeboy7002]

Thanks Dr. Nic. Question: is there a particular order of assigning dummy variables to ordinal data e.g. do I start assigning 1 and 2 or 0 and 1? do we start from zero going forward or from 1. can i assign from any number going forward?

[@DrNic]

Each dummy variable is assigned 0 or 1 according to whether the observation belongs to that group

[@justaminute3751]

Hello Dr Nic , Can I Ask You Which Programs You Prefer For Me To Use If I Don't Want To Use (Excel)

[@DrNic]

If you are a serious stats person you should possibly use R. I tend to use SPSS except I can't afford it so I use JASP which is free. For exploratory work, iNZight Lite is good. I used to teach with Minitab, which is a very nice teaching program. This blog post is still pretty relevant. creativemaths.net/blog/excel-spss-minitab-or-r/
And a suggestion - don't write in Title Case - it looks weird and makes it difficult to read.

[@yub7407]

many thanks Dr.Nic. This video will resolve all of my essay concerns in Data analysis

[@DrNic]

Happy to hear that

[@tarundoerga]

How do I join the channel besides subscribing? Some videos say "Members-only content".
Thanks! Love your videos!

[@DrNic]

That's great. You should be able to join using this link: ruclips.net/channel/UCG32MfGLit1pcqCRXyy9cAgjoin

[@DrNic]

Try the "Join" button on the channel page. If that doesn't work you may need to contact RUclips - they are pretty good at answering.

[@nantriciaali6789]

@@DrNic The "join" is not showing up on the channel.

[@DrNic]

@@nantriciaali6789 That’s a worry. I’ll look into it. Have you tried the link in the previous comment?

[@nantriciaali6789]

@@DrNic Yes I have. Wondering if RUclips has launched the feature in my country.