trend

  1. H

    Data analysis

    Hi I'm currently in the middle of a job application process and one of the stages is data analysis of two tables (one is deaths caused by diabetes between specific years and the others is deaths caused by diabetes in specific regions). I've been told to analyse the data looking for "main...
  2. C

    Finding P-Values For a Null Hypothesis with Neutral Trend

    Please help me. I am so lost. I have data that is days above a certain temperatures every year from 1948-2019. So basically something like: 1948 36 1949 31 1950 36 1951 34 1952 36 1953 35 and so on. To find the trend I already did a least-squares linear regression and go that done. Now I...
  3. G

    How to find the trend in binary time-series?

    Hello everyone! I have an event that can happen with each of my patients (Y or N), collected over many years. Theses patients are independent of each other. I want to detect the trend taking into account the binary nature of my variable but also the number of cases per year. For example, I...
  4. M

    Dealing with temporal autocorrelation

    Hi, assume we have a measured value for each year from 1990-210, and we want to estimate a linear trend. Now there is a problem of autocorrelation, i.e., the measured values do not scatter randomly around the fittet line but rather resemble a "smooth function" wriggeling around the linear fit...
  5. T

    Normalising Search Data

    Hi Guys, Just want to start by saying great forums, some really useful stuff on here! I'm basically a statistics novice, though i did do a few subjects at uni many moons ago, so forgive me if I ask some stupid questions. And apologies if this isn't in the right area. I'm working on a data...
  6. R

    Using repeated measures change/trend as a predictor variable

    I have repeated measures of happiness for a sample of participants, and a single measure of satisfaction for each of the participants. I want to predict satisfaction from the repeated measures of happiness. To do so, I want to create a new variable, called happiness.change, which measures the...
  7. D

    What test to determine if 5 years of population data has a trend?

    Hello. I have population data for 5 years for several species of birds and I would like to know whether the populations are growing, staying stable, or decreasing. I am using R. So far, what I have been doing is creating a linear model of the count data (or log of the count data) by year...
  8. R

    Regression analysis: selecting TREND or FORECAST formula

    Hello, I am doing a regression analysis on average price increases from a PPI table, and my goal is to project a 2013 value using the average yearly value from 1985 - 2012. Excel gives me two formulas to do this -- TREND and FORECAST -- and both formulas appear to perform a regression...
  9. F

    the difference between non-stationary data and random data?

    what are the the difference between non-stationary data and random data? If we detrend a stationary data and make it non-stationary what will happen, will it be random?
  10. A

    Quantifying trends and patterns, which test to use?

    Attached is an image of some graphs showing the relationship between a factor which varies year on year, compared to various other factors. With many of the factors it is clear to see that there is a relation between them, however I'm unsure as to how best to show this quantitatively! Many...
  11. C

    Statistics Help

    Hello Everyone, I'm quite new to Stats and desperately need some help here. I'm working on resource planning with some data. The data that I have is... number of work items per day during the last year. Number of work items keep changing day to day and these numbers could be anywhere...
  12. I

    Forecasting with stochastic trends and unit roots

    I'm dealing with a set of data with a unit root and a stochastic trend for class and am trying to make a forecast. any help would be greatly appreciated
  13. S

    testing rates through time

    Hello all, this seems like it should be a simple questions but our team cannot find an answer to the question. If I have data set up like the following (the numbers are the percent that react positively to the drug): Drug 2007 2008 2009 2010 A 59 62 61 62 B 50 49 58 61...
  14. E

    Linear test for trend adjusted for cluster group?

    Hi, any help appreciated with this question. I have 8 time periods over which I wish to see if usage of a service changes using several demographics (age group, sex, HIV status, etc). There are about 2000 attendances in each time period from about 50 clusters. I can get proportions with 95%...