General definitions Flashcards
1
Q
Type I error
A
False positive, i.e. telling a man he’s pregnant
2
Q
Type II error
A
False negative, i.e. telling a pregnant woman she’s not
3
Q
Autocorrelation
A
Generally referred to with time series. When a data point depends on previous data points.
4
Q
Stationary (time series)
A
1) mean doesn’t change over time (no trend)
2) homoskedasticity (variance does not change over time)
3) covariance of the ith and (i+m)th term does not change over time (so imagine a wave where the period does not change with time)
5
Q
homoscedasticity
A
the noise term is the same across all values of the independent variable
6
Q
high variance = _____fitting
A
over
7
Q
high bias = ______fitting
A
under
