week04-1

# week04-1 - TA session 4 Econ 103 winter 2010 Wed Jan 27...

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TA session 4 Econ. 103, winter 2010 Wed., Jan. 27, 2010, 10:00 a.m. and 1:00 p.m. in PP2400E. 1 Verbose discussion of certain true-false questions 1.10 An estimate and an estimator are the same thing. This is false. (As are all the T/F.) A lot of people have trouble with this at ﬁrst. The diﬀerence between the estimator and the estimate is like the diﬀerence between a function and the value a function takes. Argument x function f some value f ( x ) A function f is not a value but rather a rule mapping an argument x to a value f ( x ). For example, if the rule mapping f is to square the argument x , for any argument x the function maps x to x 2 . Remember x 2 is not a value but a particular function. A function only takes a value if given an argument. For example, suppose x = 4. For that x the function f ( x ) = x 2 takes the value 16. The number 16 is not a function but a value taken by the function. Similarly an estimator is a rule mapping some set of data

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## This note was uploaded on 03/15/2010 for the course ECON 103 taught by Professor Sandrablack during the Winter '07 term at UCLA.

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week04-1 - TA session 4 Econ 103 winter 2010 Wed Jan 27...

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