Forum: Statistics

Hello, I have a sample of data for which I have figured out that the population mean for the height of US 12-year-old children is μ = 150 cm with σ =...

What is the numerical value of the standard deviation of the following sample data? 45, 26, 36, 34, 24, and 29? Round your answer to the nearest...

Hello all. This is my first post, so please be gentle. First off, I am not a statistician in any way shape or form, however............ I am in...

I was given this problem: If X is not normally distrubuted, but Y= sqrt(X) is: which hypothesetes tests are possible and explain why: H0:...

Hey everyone, I am working on my statistical assignment for my regression class and I have encountered a problem. I have the dataset from library...

Hy, In my work, I have to compare groups of users and see if there is a significant difference between them. So, I use parametric (Student, Anova)...

Hi Guys, I can't seem to find a definitive answer to this question: can one run a Pearson's correlation on data that is not normal (but has no...

Hey everyone, I am in the process of finishing my master's thesis (strategic public relations). My thesis focuses on finding out what type of tweets...

Hi Guys, I am confused with the root mean square error of a regression. Is it actually the square root of the variance of the residuals of a...

Hi I am a very beginner so sorry for the very simple questions. I have first a very general question regarding the linear regression. This...

Hello all, I need some suggestion regarding Prediction using Time series techniques. I am using time series techniques to predict the future...

hello in my last exam statistics there was this question: A certain brand of batteries has a lifetime that has a normal distribution with a...

Hi, I have used a 5 point likert scale (agree to disagree) in a survey and found that there was a central tendency bias where respondents scored a...

Hi, I've been searching around recently to check if I am able to use one way ANOVA (parametric tests) on percentage change data? The data is from...

Hi All, New to the forum but thought it might be useful given how long it takes me to find something out via books and the internet! No substitute...

I have made a few regression models in Stata using commands like: "regress continuousvariable i.ordinalvariable ..." I'd like a p-value for the...

Hi, for standardizing a data set or (x-mean)/variance we are assuming a Gaussian distribution for the data. What should we do to know that this...

Hey, I am not very good at stats, but I have a question. Statistically speaking, if you could create a draw, with whatever amount of tickets...

I need to assess the efficacy of the drug treatment by comparison with the placebo treated (basically what is better) by t-test unparied but I cannot...

I have a clinical trail with 60 patients, suffering from a brain injury. I need to evaluate the concordance between the results of the study, as...

Hello I need help to find the good statistic to use to compare two distributions of data coming from pseudo randomized trials. I have recorded...

Hello I am using boxplots to show the distribution of some data. However, some comments says the boxplot can not show the concentration quantity...

Hello, I am developing a masters thesis which will attempt to utilize census tract data to assess the occurrence of gentrification in Washington,...

Hi there, I have data for a within-subjects study where each subject was asked to perform 3 tasks (in a randomized order to prevent learning...

Hi, I have a problem which can be described with the following analogy: If two cups containing an amount of balls are held against each other...

Suppose we have 1000 people. Of those 1000, 4 men and 2 women express interest in option A. Note that each one of the 1000 does not have to render...

Hi follows, I have data that looks as follows: X, y1, y2, y3, y4 0, 54.241, 127.728, 127.73802, ...

Hi all, I've come across a problem recently that I'm not even sure is a statistical one, but here goes! I have 50 different processes, each of...

Hi there, I have a 2x4 fully repeated measures design in which participants had to correctly state whether a target was absent or present in a...

I hope that someone is able to help me - I have taken several 500-level statistics courses at my current university, but for some reason some of this...

Hi, sorry if this is really obvious, but I have this dataset i'm meant to analyse using prism, but I'm not sure i've done the right test? I'm...

Hey guys. I've been working on some data and I've come up with an idea that I don't know how to calculate (since I'm not really a mathematician)....

I have searched online and still couldnt find an exact way to check whether there is moderation by a continuous covariant between the DV and a...

Meta-analysis using unpublished randomised trials Hi, I am intersted to do a meta-analysis, have data set from about 50 experiments, mostly...