1. C

    convergence in nMDS

    Hi, I am running and nMDS in R on abudance data and my nmds does not reach convergence I have tried to increase trymax to 1000, use k=3, use previous best and use noshare but none worked. Is there anything else I could or is there another analysis that I can use instead?
  2. A

    statistics for engineers question please help

    I need to write an original question. I will use your answer as a guide to write an original question by myself. I couldn't find a guide or some examples from books or videos. I would reallly appreciate if you know and let me know where I can also find some examples . I dont know where or how...
  3. P

    What kind of statistical test would I use for this experiment?

    Hi there, I'm sorry I'm still very new to this platform and am generally clueless about statistics. This may be a little long winded, but I'd really appreciate any help! I have two groups of organisms, all of the same species but from two different habitats, labelled "group 1" and "group 2" as...
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    Interpreting mulitiple regression coefficients

    I am quite new to statistics and trying to get a grasp of it with some coronavirus data. So, I have 16 countries and I want to find regression of coronavirus cases by population pyramid. I am using this equation. In my case it looks like this: (Obviously in calculations the first column is...
  5. M

    Choosing the right dataset

    Hi ! I need to choose a good dataset with at least two variables because I'll need to compare them by calculating measures of association, performing two-sample tests and maybe doing a nonparametric regression on R, ... Therefore, I was thinking about choosing a dataset about COVID 19 because...
  6. M

    How to split residuals into groups for the Brown-Forsythe test

    I have the following data id 1 2 3 4 5 6 7 8 9 10 11 12 num. responses 16 14 22 10 14 17 10 13 19 12 18 11 cost 77 70 85 50 62 70 55 63 88 57 81 51 I fitted the linear regression model and I got the following residuals: 5.22478992, 4.76260504, -6.38865546...
  7. R

    Which statistical tests should be performed?

    Hi, I did experiment to compare the effect
  8. E

    Homework Question

    Hi, I have a homework question that I don't fully understand. It reads like this: The mean weight of antarctic penguins found in a colony last year was 15.4 kg. In a sample of 35 penguins same time this year in the same colony the mean weight was 14.5kg. Assume the population standard deviation...
  9. S

    Stats analysis struggling

    Hi, I am conducting an experiment where I am assesing 4 groups undergoing 2 treatments. 3 groups have recieved same treatment and 1 group has recieved the other treatment. I have averaged values of the 3 groups. It is a pre and post experiment. I want to compare the data for both pre groups...
  10. C

    What test should i use? THESIS HELP!!

    Hi, I am currently studying Zoology at university. I am currently in my final year conducting my dissertation. I have completed my data collection and I am now on to my statistics. My dissertation looks at the relationship between light intensity and growth rate in marine sponges. I have 5...
  11. S

    Finding the trend whether the team is improving or not

    Suppose a basketball team scored 44,58,50,61,62 in the previous 5 games, and scored 50 in the next game. How to statistically determine if the team is improving or not, apart from comparing the immediately previous games (i.e 62 and 50).
  12. S

    What Statistical Treatment can I use in this type of data?

    We are currently conducting a small study and have very small background in Statistical Analysis. We conducted some experiments and have gathered some data. Can anyone help me in identifying what type of Statistical Treatment we can use for this? The second column pertains to the number of...
  13. E

    Questions on the Fundamentals for Various Sampling Methods

    Hello, I've recently been studying various sampling methods, specifically SRS (Simple Random Sampling), Stratified Sampling, Ratio/Regression Estimation, and Cluster Sampling. I wanted to ask a few questions regarding these methods to better understand the pros and cons for each of them and when...
  14. A

    Stastical analysis in agronomy and agriculture

    Hello all members, I need your guidance about the analysis, as you are good at statistics. I explain my experimental design. Actually I inoculated 3 microorganisms (ASS-ASL and ASY using different concentrations i.e. 50-75 and 100ul/L). I wanted to check if these organisms at different...
  15. F

    Solving an autoregressive equation

    Hi, has anyone an idea how to solve this equation: y_t - y_t-1 = c + delta*t + phi*y_t-1 + eps_t I would be super grateful if anyone could help. Cheers!
  16. A

    ANCOVA Table - Interpretation

    Hello, I don't know if there is any post already regarding this and, if there is, I am sorry for reposting. I was asked to explain a table from an ANCOVA , specifically the values of F, etc. The table in question is Table 1. Can anyone help? A.
  17. S

    Fixing behavioural difference of demographics

    Currently collecting employment/working satisfaction data from survey at different countries. Same set of questions is used. I have come across that people from some countries tend to be more optimistic/pessimistic than others. How can I take their answering behaviour into consideration when...
  18. S

    Method/test to use analyzing survey

    What type of analysis to do on staff engagement survey to find root cause of problem? Questions covers trust, well being, working environment topics. Answers collected are in 1-5 scale, 1 being strong agree. Method used so far is finding correlation between the questions. Any other...
  19. S

    Trying to help out homework on Statistics - Please advise how to go about on this one please

    Part I. Chi-Square Goodness of Fit Test (equal frequencies) A random sample of 118 weights of teenagers is obtained and the last digit is recorded. The frequency of each digit is recorded in the following table. If people report their weight, they tend to round. Test the claim that the...
  20. S

    What test to use in SPSS....PLS HELP :((

    Hi, I'm trying to write my dissertation for my 3rd year undergrad project and I am really stuck with the stats :( I carried out an observational study using questionnaires looking at public knowledge of dementia. I specifically want to look at how knowledge of Alzheimer's Disease (AD) and...