# distribution

1. ### New Tax Concept

Hello, I've been recently mulling over the systematic issues that seem to plague our current society. Primarily, income inequality. I'm a firm believer in capitalism and as such I wanted to find a solution to the income problem which worked with capitalism instead of against it. In...
2. ### Low within-scale variances leads to odd distribution

Hello everyone: I'm a first time poster and I believe that this thread belongs in the General Stats topic, but feel free to correct me if you think it would have a better home under another topic. I have a nine-item measure with four response options. Across ~450 participants, ~180 had...
3. ### differential distribution frequency

Hi there. pls I'm studying the production of energy from sawdust.So I need a firm grip in powder technology.Can anyone pls show me mathematically how the differential distribution frequency fm(D) was obtained in the attachment below. the data is from a published journal.Many thanks
4. ### Can I use a Negative Binomial Regression for a Continuous Outcome?

Hello, My outcome is Sugar intake with a highly skewed continuous outcome variable. The histogram and variable details are Attached. Since the distribution is highly skewed and has a very high variance (12.78) compared to the mean (2.67) I thought I could round each decimal to the nearest...
5. ### Comparing means with Poisson distributed data?

Hi everyone! How can I perform ANOVA, so to compare means, when the data of my groups are clearly Poisson distributed (towards 0 values)? Thanks a lot! Cheers
6. ### Show distributions, same height different variances

I want show two distributions on the same pot that have identical height but different variances. I understand logically why my approach below doesn't result in equal heights. Now how can I force it to have equal heights. if (!require("pacman")) install.packages("pacman")...
7. ### Detecting Change in not Normally Distributed Count Data

Hello, I was wondering if anyone could shed some light on how to interrogate count data whichholds a lot of 0'sand therefore not normally distributed. I have pasted in an example of the dataset i'm using. It gives 4 species counts across 27 sites (replicates) across intermittent years...
8. ### Aggregate Loss Model (Actuarial Science)

Question: Let S be the random sum of N independent frequencies {{M_i}} where N is negative binomial distributed with r = 5 and \beta= 3 and {M_i} is Poisson distributed with  = 3. Find F_S(3) Attempt: I know the formulas for these two distribution, but I am totally lost of how I...
9. ### How to test data if it is normal distribution in spss ?

Hello Good morning guys i will need some help truly i have variables in spss most of them scale type, some of them are nominal, and few are ordinal. My questions how can i get the graph for normal distribution for the whole data ? shall i combine all scales into one variable and combine all...
10. ### Need help starting this question; unable to identify what type of question it is

I can't tell if its asking for a binomial distribution or a normal probability distribution.. or maybe an approximation of a binomial distribution using a normal distribution..but then where does a random variable come in? here is the question: A company that manufactures mufflers for cars...
11. ### How well a few values fit a given distribution?

Dear all, I have approximated two one-dimensional random variables A and B using Gaussian Mixture Models (3 gaussians). I used gmdistribution.fit Matlab function with 10000 values. The resulting distributions are called f_{A}(x) and f_{B}(x) (shown in attached Figure 1, being...
12. ### sampling distribution question help.

"Mendel’s laws of inheritance indicate that individuals in a second-generation cross have a 75% chance of carrying a dominant trait and a 25% chance of carrying a recessive trait. Inheritance occurs independently in each individual. What is the sampling distribution of the proportion of...
13. ### What type of distribution is?

Usually results of direct measurements are normally distrubuted. Also, if we make linear transformation on result. e.g. if X it is a normally distrubuted random variable, also Y=a+bX also it is. Statement is not any more thrue, if we make exponential or logaritmic transformations. e.g. if Y...
14. ### Comparison of two treatments (paired and unpaired)

Hi all! I'm working on my Master thesis and need to make sure I'm not doing it wrong. My research: Are answers to questions a and b significantly different from one another, and why? Questions a and b are answered on a scale from 0 to 10. My data: 153 survey responses, split into 3...
15. ### Profiling a Number Series

Hi everyone, I'm new here. My question is how do you profile a series to determine what kind of distribution it is? For example a series of returns in the financial stock market. Is there a way to define the distribution type and characteristics based on a given number series (in this case...
16. ### Sum of n random variables with normal distribution

I am struggling with this problem: Independent random variables X_1, ... , X_n have normal distribution with mean 0 and variance 2. What is the distribution of random variable: X_1 + ... + X_n ? I know that the sum od two random variables with normal distribution has normal distribution as...
17. K

### What type of distribution is this and am I being sensible?

I have a computer model, which I need to run 3500 times with different input parameters. The model's accuracy depends on a constant, let's call it T, which unlike the input parameters doesn't change between model runs. By decreasing T, the model's accuracy improves but the computational cost...
18. ### Link function for proportional outcome

I have a data set where the outcome variable is percent passing (ELA and Math tests) for school districts. I will use a 2 level multilevel model with various predictors/covariates at level one and two. The outcome variable is percent passing. Obviously the outcome is limited to between 0...
19. ### Fieller-Hinkley Ratio of Correlated Random Variables: Question On Applying Theory

I am a senior in college writing a thesis analyzing and critiquing government income transfer programs, such as SNAP (food stamps). Here is my issue. I am using data collected from the consumer expenditure survey, which will typically provide means, sample sizes, and standard errors. I am...
20. ### Fieller-Hinkley Ratio of Correlated Random Variables: Question On Applying Theory

I am a senior in college writing a thesis analyzing and critiquing government income transfer programs, such as SNAP (food stamps). Here is my issue. I am using data collected from the consumer expenditure survey, which will typically provide means, sample sizes, and standard errors. I am...