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Chris Umphlett
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51 Answers

Votes Activity Newest
4
Can a prediction be better with insignificant variables than with only significant variables (or none at all)?
May 19 '19 at 21:04
3
Definition of forecasting period in time series
Aug 16 '18 at 16:22
2
How long does it take to clean data?
Feb 6 '19 at 19:37
2
How to split a time series into “day” and “night” intervals?
Sep 10 '18 at 13:03
2
Holt-Winters function hw() in R
Aug 10 '18 at 18:03
2
I need help clarifying the term forecast interval
Aug 8 '18 at 19:39
1
How to use Holt-Winters' seasonal multiplicative method when the data has zero values
Mar 19 '20 at 16:41
1
ARIMA model for a single variable with hidden context
Nov 27 '19 at 14:03
1
Does lack of seasonality imply random time series?
Apr 18 '19 at 15:10
1
Prediction of multiple time series of different lengths
Sep 28 '18 at 14:40
1
What's a simple way to test for a break in a small sample time-series?
Sep 13 '18 at 0:30
1
Coin toss - win if $0.4 \leq $ heads $ \leq 0.6$, should it be tossed 100 or 10 times
Aug 30 '18 at 12:58
1
Is there a way to add external regressors for exponential smoothing based models?
Aug 29 '18 at 23:23
1
multi-collinearity in a time series?
Aug 27 '18 at 18:59
1
Highly correlated (independent) variables
Aug 23 '18 at 11:49
1
does including “neighborhood income” as a feature increase or decrease bias (in the discriminatory, cultural sense)?
Aug 21 '18 at 16:58
1
Can I roll-up forecasts to analyze against benchmark methods?
Aug 20 '18 at 0:11
1
Dealing with missing data in Time Series or non-constant time intervals for forecasting in R (ARIMA, Holt Winters, Theta)
Aug 14 '18 at 13:22
1
how to determine Time Series Model? Additive Multiplicative?
Aug 13 '18 at 11:03
1
Black Friday Staffing
Aug 10 '18 at 11:22
1
R Difference ets, holt, forecast.HoltWinters
Aug 8 '18 at 14:20
0
Why the seasonality of daily time series is not predicted correctly in R with arima model?
Dec 19 '19 at 16:00
0
How to make a choice when there is doubt between a variable being categorical or continuous?
Dec 14 '19 at 11:09
0
Are the forecasting methods like mean, naive, drift, weighted average applicable to non stationary time series?
Dec 3 '19 at 22:02
0
Tackling challenging semi-weekly or weekly data with gaps
Sep 25 '19 at 10:41
0
Machine Learning model for time-series traffic prediction for medium term (1-year)
Jun 25 '19 at 2:11
0
Statistical test/method to create clusters or determine similarity between groups with many values for a single classifier
Apr 16 '19 at 17:54
0
What can I do with my index data?
Mar 29 '19 at 14:01
0
Holt-winters method, outlier day of week
Mar 5 '19 at 3:21
0
Anomaly detection with complex seasonality
Feb 15 '19 at 10:11
1
2