significance testing

Hi, I'm trying to work out the correct non parametric T test to use for my data. My data is made of two large groups. Each value in the first group has a corresponding later value e.g. it is showing the chance in frequency from point 1 to point 2 over time, there is many different points for...

Hi everyone. So I am doing a data analysis between variables of 2 groups to find a significant difference between them. I used the Games Howell test to find the difference as both groups have unequal data size. Now I would like to tabulate a table with all the results and values, but I am...

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...

Hi all, I need some help with my SPSS testing. I am testing how salinity causes a difference in population growth for a species of jellyfish polyp. I have 3 groups of jellyfish polyps, which remain independent from each other. Each group of polyps is put under a different treatment of...

Hello guys!:) I wonder whether anyone of you who is killing in statistics could give an advice. I am writing my master thesis at the moment. The first part of my research is planned to be focused on the sample of N oilservice firms, in other words, firms in the same industry. What i want...

Hi, I've attached a word file - it contains exam results. There were two sessions - one AM and one PM. . I am trying to work out if there is a statistical significance between the achievement of the AM and PM groups and whether moderation should have occurred here? Can anyone help? I have...

A multilevel model, with one explanatory variable at the individual level (X) and one explanatory variable at the group level (Z): Y_{ij}=\gamma_{00}+\gamma_{10}X_{ij}+\gamma_{01}Z_{j}+\gamma_{11}X_{ij}Z_{j}+u_{0j}+u_{1j}X_{ij}+e_{ij} correlation between u_{0j} and u_{1j} is 0 . In this...

Hey all, it would be very nice if someone could help me! I want to test for significant differences in a dataset where I have 4 different locations for which I assessed the total weight (kg). So I have A-1 (kg), A-2 (kg), B-1 (kg) and B-2 (kg). I subdivided those then into different...

Hi everyone, New to Talk Stats, so be nice! I have looked for an answer to my problem on previous posts but have not been able to find anything suitable. Basically I am comparing the data between three different groups who have all performed a particular type of examination. I have carried...

Hi Guys, I have an okay understanding of statistics but struggled with this one as it is not something I have done before, any help or pointers would be amazing! I want to create crosstabs of results for questions, by two groups, region and age group (coded), which is fine, but is there a...

I'm looking to analyse some data and as it's been a long time since my statistics days I'd like to know which area of statistics my problem lies. Lets say I have a number of different driving schools, each doing the same test of their student drivers' ability to have a licence. Now every...

Hi. I'm really sorry if this question is in the wrong place. I'm trying to figure out and justify statistical tests to be used for a research proposal - don't have to do the tests just explain and justify my selection. I am comparing 2 groups. group a has 1 days training and group b has 5...

Hi all, I have a question about including dummy variables in mijn analysis for master thesis. In my analysis I investigate the relationship between a couple of macro-economic indicators (GDP, unemployement, inflation) and valuation multiples of companies/industries in the DJSTOXX600 (f.e...

I have a data set consisting of two different groups (A and B) each with 5 specimens. We tested 73 different variables in each specimen and recorded the data. I am new to statistics, so I am struggling to find the best method(s) in which to analyse the data so that I can find which variable(s)...

Hi everyone. I am new in this forum and also new in statistic. My background is civil engineering. I've been looking for a solution for my question and found out that this forum is very helpful. I need to explore how my independent variables affect/impact the dependent variable, which one has...

Hi all, I was hoping for some advice on how to test the change between two groups. First of all, my groups are relatively large (n=100-150). For each member of the two groups I have the following: I have observed 'x' many of something in group one, and have extrapolated this to expect 'y'...

Hi all, can someone point me in the right direction for how i would work out stat sig of share of spend? eg - 5 companies in market, ask ppl how much you spend with each for say phone bill. This will then give total spend for each of the companies, and total market spend, therefore can...

Hi all I have been given some data and I need to do some significance testing on it. The data revolves around food types. Firstly I have been given data, about 1000 rows, of a food type with the date the food was bought and date it went off, I need to test whether after X number of days, a...

Hi, I'm teaching myself survival analysis with free resources on the web. I'm quite confident that I'm correct, but I just want to clarify that I have interpreted everything correctly! I am comparing the survival of a control and test group. I want to determine whether there is a...