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Hello!

I have a preloaded data which contains four columns and each column contains the following data in the following order:

- Income (dollars)
- Education
- A dummy variable, 1 for male and 0 for female
- Another dummy variable, 1 for STEM and 0 for not STEM

I've been given the linear model:

INCOME = α + β1EDUCATION + β2MALE + β3STEM

I should answer the following questions:

a) How large is α in the above equation

b) How many dollars greater is the salary of a male than the salary of a female

From what I understand, I should start with storing each column in the data in separate variables. How would I do this?

Any hints to get me started with this task are appreciated!

Stephan
on 12 Oct 2019

Edited: Stephan
on 12 Oct 2019

add a column of ones to your matrix DATA in pos. 4. isolate income as a column vector and remove this column from DATA then use:

X = DATA\INCOME

you get the beta values (1-3) and the last one is alpha.

Also possible:

DATA = [DATA ones(size(DATA,1),1]

vals = DATA(:,2:end)\DATA(:,1)

The other stuff should be not a problem by using logical indexing.

Stephan
on 12 Oct 2019

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