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statistics, mesurement

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I got this task that is killing me....

I got 2 different kinds of measurements:


1. photogrammetretric mesurement:

standard deviation of 4.7cm and 36 degrees of freedom.


2. two measurements of total station:

standard deviation of 6.1cm and 71 degrees of freedom.

and the second mesurement

standard deviation of 4.7cm and 69 degrees of freedom.


Now the question is: Is it likely to say that the photogrametric method is better than the total station?


I know that i have to use a f-distubution, but my problem is i can't figure out how to compute the two measurements of the total station?


I am using matlab, to do the calculations and the f-distubution..


anyone who can help me?

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