statistical analysis

  1. H

    Need Help With Forecasting Analysis

    Greetings experts, I need advice regarding what kinds of forecasting methods I should use along with what kind of statistical distributions I can use to test my data. As of now, some forecasting methods I know are Holt's Method, Exponential Smoothing and forecasting error methods such as MAD...
  2. jerryuk5

    Any analysis other than descriptive analysis ?

    I am a post graduate student and my mentor approved my study however they remarked that my use of descriptive analysis to all my three variables ( AUDIT tool, Job Satisfaction Survey, and CARE feedback ) was simple and could have been better analyzed in other ways. Any suggestions ? I am also...
  3. J

    Stats help - uni project

    Hi all, im currently at uni and need help doing some statistical analysis. So what my project is primary based about is around animals, we score their weight on a scale of 1-9 (called body condition score) where 9 would be obese and 1 would be super skinny. My project hypothesises that owners...
  4. H

    correcting with poisson regression

    Hi everyone, I'm new to stats and I was wondering if anyone had any good resources that could explain to me: How one can correct their data (false-positives) using poisson-regression. I've been looking for some resources to explain it simply and give a step by step (in r ) but I've had...
  5. J

    Statistical Tests

    I am currently completing my dissertation and I need to compare some wave data. I have the forecast wave heights and the actual wave heights. I need to find how accurate the forecast wave heights were and therefore need the correct statistical test or multiple! Thank you, Jess
  6. K

    Hiring statisticians for a long-term trading project

    Hi everyone We are working on a stock and forex based trading algorithm. We are using statistical methods in our trading. We are already funded (but not live yet) so this is going to be a job from 1st day. We already have the idea. All of our team members will get a slice from the pie. This is...
  7. S

    Best statistical method for CFU/ml?

    I have sets of data in CFU/ml for different sampling sites collected in two different seasons. 1. How do I compare the CFU/ml between sampling sites within one season? 2. How do I compare the CFU/ml in different seasons of the same sampling site? one-way ANOVA?
  8. R

    Statistical analysis of scientific data

    Dear All, Hi, I am doing PhD in the field of material science. I want to know what kind of statistical method I can apply to interpret results of my experiment. Suppose, I have 30 samples and there are about 15 properties associated with each of these samples. With this post, I want to attach...
  9. L

    t-test or any other form of statistical analysis?

    Hi, I am working on the below raw data and want to compare between control group vs various amino acid concentration level. I know, I can use T-Test to compare control vs each concentration level. Besides, the data is following normal distribution. The data is measured up to 10 days...
  10. M

    Matt Whiteny U test Vs T test

    Hello fellow statisticians, Problem definition: I need to test whether the difference between the "mean" utilization metrics of two machines is statistically significant. Given Data: Utilisation data is available for two machines for more than 100 days. Therefore, the mean, standard...
  11. P

    Calculating representative value for data

    Assume there are ten data with values a_1, a_2, ..., a_10 each with different non-symmetric errors. The problem confronting me in brief is, to combine the 10 results a_i and their associated non-symmetric errors according to some acceptable precept so as to determine the value of a and its...
  12. P

    Calculating ensemble value for data with non-gaussian errors

    I have 10 data points each of which have non-symmetric (i.e., non-Gaussian) errors. That is, if 'a' is the central value (representing the median), then a^{+b}_{-c} means that 'b' is the positive 1-sigma error and 'c' is the negative 1-sigma error. I want to be able to get a representative value...
  13. L

    which statistical tests to use?

    Hi, I am very new to statistics. I have some data that I would like to perform additional statistical analysis on it. The data is related to two groups of people. Group 1: control group Group 2: people with obesity Group 2 is following a healthy food plan. Measurements are being...
  14. A

    Chi Square or T Tests for Likert Scale Type Survey

    So I have a 4 point likert-type scale with approximately 20 questions. I have categorized each item to be either agree or disagree. I mainly did this because the previous person who used this scale did this. However, that person only displayed frequency data for it and did not run any tests for...
  15. D

    Which type of analysis should I do? HELP!! Dissertation Issues!

    Finally getting back to research for my dissertation after a 4 year break from the classroom!! need some help on which analyses are best for some of the following scenarios. Thanks!! 1-test the statistical significance of and type of relationship between a DV (scale level of measure—i.e...
  16. N

    Statistical analysis - Work Delay - Some tests relations

    Suppouse that we have a dataframe called dataWork with data from a database. There are several variables and 2 of them are: - Delay: time (minutes) to get to work (could be empty) - Nocturnal: 0 (work by day) 1 (work by night) we want to know the relation between delay and nocturnal. So...
  17. M

    Different samples

    Hello everyone I have the following doubt How can I prove that the data of different samples (sample 1 and sample 2) have similar behaviors? Graphically I can see that they have similar behavior, but how can I prove with a statistical test? I appreciate your answers Thanks so much...
  18. M

    Help with Statistical distributions

    Hello I have the following doubt, I hope you can help me, I really appreciate it - I have a population of 500 businesses - A sample of the businesses with the highest sales (200 businesses) - Each business can sell many products, but I would like to know the behavior of only one group or...
  19. S

    Need help in deciding whether to use parametric test or non parametric test ?

    I am working on an assignment. I have sample study of 9 participants suffering from a mental disorder and the participants mood scores are being measured at three time points after subjecting these participants to a new intervention.The mood scores are normally distributed. Should I run a...
  20. M

    Which analysis represents better the "worse-ness" of my linear regression?

    Hello all, If I have two sets of data points, for instance: 1 10 2 14 3 17 4 12 5 19 and 1 10 2 14 3 17 4 12 100 112 The linear regression is bad for the first set and good for the second, if you look at R^2, but it is still a bad line. I was told that...