statistics

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    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...
  2. 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...
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    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...
  4. 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).
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    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...
  6. 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...
  7. 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...
  8. 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!
  9. 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.
  10. 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...
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    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...
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    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...
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    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...
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    Anyone can help me with choosing classes?

    I am a sophomore in UT Austin. Our university does not have statistics degree for undergrads so I am here for help :( I am interested in applying for statistics grad school in the future, especially in OR, Machine Learning. This year I've taken probability. Any courses may help me solid the...
  15. M

    Probability 2-vector probability

    Can someone help me to answer the third question please.
  16. J

    drawing up a mediation model with 2 predictors and 1 mediator

    Hello all, I was hoping someone could help my understand where a certain value comes from in my data output (using SPSS). I have performed a hierarchical multiple linear regression and the used PROCESS to find that my model has 2 predictor variables which both go through the 1 mediator variable...
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    Generalized linear mixed model: Type III significant but multiple comparisons not significant

    Hi guys I am running a glmm model for my data, the Type III tests of fixed effects is showing that there is a significant effect of treatment but when i run the multiple comparisons, non of the treatment levels are significant. What causes this confusion? Is my model not right maybe? Regards...
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    How to show statistical equivalence between groups of data?

    I'm trying to determine if these two groups of data are equivalent. How do I show that mathematically? I have conducted an experiment in which three samples were each measured at two time points as shown in the image. I would like to compare these data and demonstrate (with some sort of...
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    "Number of Persons” Vs “Number of Person-years” in a Stationary Population

    I have learnt that the life table function nLx is the number of "person-years" lived by the cohort between ages x and x+n. But for stationary population, nLx is defined as the number of persons in the population who at any moment are living within the age interval (x, x+n). I don't...
  20. R

    Help with choosing a method

    Hi, I am currently conducting a short research paper for my university course and am struggling to determine which statistical analysis would be appropriate for the data I have collected. I surveyed two groups of 50 people: 50 x people aged 40 and over 50 x people aged under 40 My hypothesis...