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help with T-test and degrees of freedom for IA


SouthernBelle

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Does anyone have any good resources about using tables of significance to test the results of a T-test??

From the IB HL Maths formula book:

mfKES.gif

Here are some websites which explain the process:

http://www.socialresearchmethods.net/kb/stat_t.php

http://www.biology.ed.ac.uk/research/groups/jdeacon/statistics/tress4a.html

You use the t-test when the variance of the population is unknown. The degrees of freedom refers to the number of constraints, for most tests, its: number of columns in your data + number of rows - 2.

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Does anyone have any good resources about using tables of significance to test the results of a T-test??

From the IB HL Maths formula book:

mfKES.gif

Here are some websites which explain the process:

http://www.socialresearchmethods.net/kb/stat_t.php

http://www.biology.ed.ac.uk/research/groups/jdeacon/statistics/tress4a.html

You use the t-test when the variance of the population is unknown. The degrees of freedom refers to the number of constraints, for most tests, its: number of columns in your data + number of rows - 2.

(rows-1)(columns-1)

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