Exam I Flashcards
1
Q
X-bar is BLUE if
A
X-bar is the most efficient of all linear unbiased estimators of mew-x.
2
Q
The power of the test is…
A
the probability that the test correctly rejects H0 when the alt H1 is true.
3
Q
The difference between the sample var and population var is …
A
That the sample variance is the SUMMATION divided by n-1 df. The pop variance is the EXPECTED VALUE of deviation (not divided)
4
Q
The standard error of y-hat is an _____ of the SD of ___, defined_____
A
estimator, of the SD of Y-bar, defined as the sample SD divided by the sqrt(n)
5
Q
The sample t-test for the above is …
A
(Y-bar - mew)/sqrt((s^2)/n)
6
Q
Can a biased estimator be consistent?
A
Absolutely. Even if you have a biased estimator, it may still be consistent.
