Edited, memorised or added to reading queue

on 12-May-2015 (Tue)

Do you want BuboFlash to help you learning these things? Click here to log in or create user.

Flashcard 150890624

Tags
#m249 #mathematics #open-university #statistics #time-series
Question
Suppose that the data are quarterly, so that T = 4; to smoothen out seasonal variations we cannot use simple moving average with period T = 4 (because number is even), and if we use T = 5, one season (e.g. winter and next winter) would be counted twice. How to recover from this?
Answer
Use T = 5 weighted average and weight down the season counted twice with 0.5 (relative to other periods' weights).

statusnot learnedmeasured difficulty37% [default]last interval [days]               
repetition number in this series0memorised on               scheduled repetition               
scheduled repetition interval               last repetition or drill

pdf

cannot see any pdfs






Flashcard 150890643

Tags
#m249 #mathematics #open-university #statistics #time-series
Question
The simple moving average is a weighted moving average in which the weights aj are all equal to [...]
Answer
N −1

statusnot learnedmeasured difficulty37% [default]last interval [days]               
repetition number in this series0memorised on               scheduled repetition               
scheduled repetition interval               last repetition or drill

Parent (intermediate) annotation

Open it
The simple moving average is a weighted moving average in which the weights a j are all equal to (2q +1) −1

Original toplevel document (pdf)

cannot see any pdfs






Annotation 150890950

#m249 #mathematics #open-university #statistics #time-series
One way to predict tomorrow’s average temperature is to assume it will be the same as today’s.
statusnot read reprioritisations
last reprioritisation on suggested re-reading day
started reading on finished reading on

pdf

cannot see any pdfs



Flashcard 150890954

Tags
#m249 #mathematics #open-university #statistics #time-series
Question
One way to predict tomorrow’s average temperature is to assume it will be the same as [...].
Answer
today’s

statusnot learnedmeasured difficulty37% [default]last interval [days]               
repetition number in this series0memorised on               scheduled repetition               
scheduled repetition interval               last repetition or drill

Parent (intermediate) annotation

Open it
One way to predict tomorrow’s average temperature is to assume it will be the same as today’s.

Original toplevel document (pdf)

cannot see any pdfs