stats

1. Item Response Theory (IRT) and Response Time (Millisecond)

Greetings from Spain, I have a question My doctoral thesis professor and I want to apply IRT to a series of neuropsychological tests (STROOP, Ekman, Discounting Test among others) The bibliography on the subject is almost nonexistent. Can this model be applied for continuous variables? Can ms...
2. Computing relative score for % Values distribution ?

Hi , I have a survey % values in the following order (in the attachment) with Survey campaign no A1 to A19, and its percentage value i.e (number of surveys successful/total surveys)*!00 , ? Now I have to score the survey campaign such that the min and max values are in the band of 1 to 10 i.e...
3. Best approach of reliability

Hi If im trying to measure the reliability of my test, which is aimed to measure defense mechanisms. and theres 2 types of defense mechanism, for example avoidance and emotional support, what is the best approach of reliability I should use? is my test considered unidimensional?
4. Logistic Regression: Estimate

TestTrans YTrans N TotalRRRR055104.7%50.0%131691005.7%31.0%Total3674
5. Which statistical tests to use?

I am currently looking to carry out some statistical analysis on some research for my dissertation. I am evaluating the impact of a training programme on the number of incidents related to the training subject across several health boards. I have data on the number of training passes for each...
6. Stats Novice: Help finding if 1 value affects another

Apologies I have learning trouble and stats are a particularly weak point. Im doing research on 10 animals species, and their conservation status at 3 time periods. (1990, 2009, 2017). Statuses range of 7 values, from data deficient, threatened ect. to extinct. Against the number of...
7. Simulating a ranking/draft system in R

Trying to simulate a draft/ranking system based on prior, already existing individual team rankings in R. Here is the full link to the question: http://stackoverflow.com/questions/42093872/player-ranking-draft-system-simulate-a-draft-overall-ranking-system-based-on-pa
8. Stats Homework Help

Hey Everyone! :) I am stuck on some stats homework questions! Hoping someone can help me out.. 1. A friend flips a coin 10 times and says that the probability of getting a head is 60% because he got six heads. Is the friend referring to an estimated probability or the​ probability's true​...
9. SOS-Where to begin on this complex data set and what Stat Model to use?

Hi Everyone, This is my first time EVER posting anything on the web for help, so here it goes. Recently I applied for a job and they sent me over this complex data set as part of the interview process. Of course I failed miserably and tried everything I could with excel. I would like...
10. Statpedia: Looking for feedback & help

Hello, My team and I recently created an open project for people to create charts in a super easy way. I thought I would share it with this group for suggestions or how people like it. The project is statpedia.com, the new version was just released. We really want to create something...
11. Finding Joint Posterior Density of Poisson and Exp?

Hi, Some friends and I have been stuck on this bayesian stats question for five days now, please shed some light if you can :wave: We've tried to multiply the the Poisson posterior density and exponential posterior density together to produce a joint density, but we're told it's not correct :/...
12. Intro Stats Problem.

A student takes a true or false test with 15 questions. He guesses on every question. 1) Find the probability that he gets atleast 1 question right 2) Find the probability he gets 60% or higher. I am stuck. I know it is something with perms and coms. Any help would be great.
13. Monte Carlo Simulation?

Sorry I want this deleted
14. Help with Biostats Hw question

The research team has considered your answers to the above. They’ve narrowed their interest to two outcomes (for now): Number of episodes of early rejection symptoms and rejection status. However, they want to know how many subjects they should recruit for each outcome. For simplicity, they...
15. CLT and Proportions

I would like to ask those of you who know their CLTs and Proportions a few questions. I am completing my HW right now and wanted do ask you guys a few Qs please. :wave: Example: The mean price of shoes in a certain store is $585 with a standard deviation of$195. I am randomly selecting 35...
16. Can I use ANOVA on Rstudio using a Likert Scale like questionnaire ?

Hello, this is my first post on talkstats so hopefully I make sense. I am 'Comparing Interactive verse non-interaction education displays of Insect and Reptile and Amphibian Conservation'. I handed out a questionnaire to three different groups; a control, a group that was part of the...
17. Stats - What Government Can Learn From Baseball

Hi All, The City of Boston is using statistics and data in unprecedented ways to make citizens lives better -- everything from using Waze data to manage traffic (6:30) to "CityScore," way to measure all of our indicators and give ourselves a single score (12:20). Please see the TEDx talk below...
18. Chi square Or Mann U Whitney for comparing student grades

Hi, for my study I have obtained the UK classification grades that are used at University. I've obtained data from two groups of students first generation and continuing generation. I want to see if there is a difference I'n grades between the groups. The problem I have is that I've obtained...
19. quick stats question(standard error), please help!

Suppose after performing a random experiment, it comes out that exactly 3 out of 20 to 30 year old males are shorter than 5.5 feet. consider the proportion of people in the sample that are shorter than 5.5 feet. What is the standard error of this sample proportion?
20. Top 20 happiest countries in the world

Here are the top 20 happiest countries. Happiness is measured based on the factors like Economic wellness, Environmental wellness, Physical and Mental Wellness, Social and Political Wellness. Denmark Norway Switzerland Netherlands Sweden Canada Finland Austria Iceland Australia...