1
vote
1answer
46 views

Building a time series model using more than independent variables

I am working on a project, and I am totally new to statistics. I have sales data for last two years at week level, along with other variables like temperature, holiday (TRUE/FALSE), where holiday are ...
0
votes
0answers
20 views

How to do Simulation for Time Series Model using SPSS

I am totally new to SPSS. I have a question on Simulation. Can we apply simulation for time series model using SPSS? Thanks in advance.
-2
votes
1answer
53 views

ISPSS: Cross-sectional time series analysis

I am trying to run a multiple regression in SPSS. I am using panel data with 4 independent variables. Of these, one is a dummy variable. Can someone please guide me through the process or give me ...
1
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0answers
17 views

Linear Mixed Models with variable time points in SPSS

I am analyzing a clinical study measuring patients' symptoms and brain structure sizes over three time points. The "visits" should be at baseline, 3 months and 12 months but they vary considerably and ...
0
votes
1answer
31 views

Constant forecasts in SPSS

I have weekly data for the last four years. I am using SPSS to do forecasting. I am getting a constant value in the forecast period. What could be the reason behind it? Is it due to defining weekly ...
0
votes
0answers
20 views

How can I statistically compare two time-series? [duplicate]

I have two time-series. Data have been logged over time for two different objects. Is there a significance test, applicable in SPSS or Minitab, that can be used to determine whether there is a ...
0
votes
2answers
132 views

Correlating time series for 20 regions (SPSS)

I have a question to which I can't find an answer although I spent really awfully lot of time searching. I have time series data for about 20 regions of a country. Each time series covers 20 years. ...
0
votes
1answer
262 views

Marketing Mix Modeling for sales data

I have data for 4 years with variables year, month and sales volume only. I want to find the base volume and incremental volume. I want to use Marketing Mix Modeling. Can anybody tell how to define ...
-1
votes
1answer
339 views

Linear/Non-linear Regression - SPSS

Hopefully somebody will be able to shed some light on my SPSS problems! I have been given 65 values. 57 of these data values are quarterly results and 8 are the holdback data to be used. I have to ...
1
vote
1answer
242 views

Use correlation to compare two time series?

I have two time series data sets which contain hourly-intervalled, monthly, and yearly household electricity consumption in kWh. One data set is produced by a simulation, the other gathered from the ...
0
votes
0answers
76 views

How to account for short-term trends of time-series data?

I would like to find out which of my 10 independent variables (IVs) best accounts for the changes of my dependent variable at different points of time within the last 30 years. In order to explain ...
1
vote
3answers
274 views

How to cluster time series?

I have a question about cluster analysis. There are 3000 companies, which have to be clustered according to their power usage over 5 years. Each company has values for every hour during 5 years. I ...
0
votes
0answers
104 views

What is the most appropriate implemented statistical method for marketing mix model with Spss Modeler

I want to use marketing mix models with SPSS Modeler so as to estimate the impact of each marketing activity (tv, clicks) seasonality and promo activities etc. I have 1 year's data. What are the ...
0
votes
0answers
24 views

Technique for neurovascular experimental analysis?

I'm trying to run statistical analyses on the data I got from some neuroscientific experiments. Because I don't have a solid math background, I would really appreciate any input as to what tools to ...
1
vote
2answers
363 views

Comparing two sets of time-series (physiological measures)

I need help in finding which statistical approach I need to use. I have two groups: G1 (disease) and control. For both groups we measured their blood level every 10 minutes: 0 to 650 min. We are ...
0
votes
0answers
125 views

How to correctly estimate statistical significance of regression coefficients?

Say that I want to determine the statistical difference between the coefficients derived from the FF three factor model of two portfolios (Spe and ...
0
votes
2answers
480 views

Linear Regression Analysis using SPSS (I think)

I am trying to conduct a study into whether or not female board presence affects firm performance. My background is accountancy and business NOT maths or statistics and so I don't really understand ...
0
votes
1answer
138 views

How to regress a time series of proportions?

Every month, an organization surveys some of its customers (the total number of customers is also known). The sampled customers answer a survey with a dozen or so questions; sometimes, customers ...
1
vote
1answer
237 views

Clustering time series

I want to create forecasting for a large quantity of time series. Since they are too many, I am thinking on reducing my data by clustering it into to similar groups. However, I am using SPSS modeler ...
1
vote
1answer
451 views

Clustering of time series

I have a set of almost 1600 time series on 2 years which I want to group into clusters. Do you think this is possible using k-means? Which method do you advice me to use? Is this possible at all using ...
3
votes
2answers
3k views

How to compare two time series?

I have collected temperature readings for 4 locations on a beach in Cornwall UK using data loggers. The loggers recorded temperature every 15 mins accurate to .1 of a degree (Celsius). The loggers ...
-1
votes
1answer
116 views

Fault causal analysis

I have some time-series data, which deal with various incidents / asset failures / faults somewhere in the network that have an effect on performance (we call them Key Performance Indicators). Now, I ...
6
votes
4answers
5k views

How to perform pooled cross-sectional time series analysis?

For 86 companies and for 103 days, I have collected (i) tweets (variable hbVol) about each company and (ii) pageviews for the corporate wikipedia page (...
3
votes
1answer
82 views

How to handle news coverage ratio in a regression analysis?

I have collected data from Twitter, Google and Wikipedia to look for any correlations (and perhaps predictive value) against the stock market. I have collected daily Twitter, Google and Wikipedia ...
1
vote
0answers
249 views

Aligned rank transform on time series data

I have some time-series data that I wish to test to see if a certain factor has an effect. There are few samples per time step (10 on average), but the whole time-series has 306 samples. When divided ...
2
votes
1answer
300 views

How to test changes in call volume over time?

I have carried out a study on change of call volume over a year (oct 07-mar 09). What statistical test on SPSS software can I use to show the difference in call volume on a day by day basis and on a ...
0
votes
3answers
1k views

Seasonal data forecasting issues

I have a seasonally decomposed data set. The data set has strong seasonality. Now I am trying to fit the 'seasonal part' of dataset into ARIMA model and tried to forecast (with SPSS). The problem ...
1
vote
2answers
1k views

Forecasting stock prices time series based on independent factors using ARIMA model

I am trying to forecast time series of stock for a particular case in which closing value of the stock depends on independent factors which is in which infact another time series. Situation is like I ...
3
votes
6answers
460 views

How to assess effect of intervention in one state versus another using annual case fatality rate?

I am a beginner in statistics with just basic knowledge. I have these data: cases, deaths and CFR (Case Fatality Rate-deaths per 100 cases) of a disease for 17 years (1994-2010) from 2 neighbouring ...
6
votes
2answers
430 views

Hypothesis testing that one time-series of a measure of entropy doesn't belong to a population

Disclaimer: I'm a software engineer, not a statistician, so please forgive any blunt error :-) I have a set of time-series "curves", each measuring the entropy of a given artifact. Now, I'm standing ...