statistic

1. Choosing a representative reference value

Hello, let's see if someone can help me with this. I have a data series of a year of road traffic in a concrete point (number of vehicles/day) I want to find a stadistic, like the maximum, the mean, the mean plus the standard deviation or other that represent my data series in most of the...
2. Mediation analysis for two correlated mediators

Hey people, I am trying to find an appropriate mediation analysis method. I want to investigate how an INTERACTION of two variables mediates the association of two different variables. I have read about mediation analysis with one or multiple mediators, but nothing about an interaction as the...
3. Estimating the Average and Standard Deviation with Missing Data

I need a way to shows me how the parameters of PDF, log-normal in this case, can be estimated based on a set with missing data points at the tail end of a sample. For example, Consider we had 20 numbers with specified μ and σ, and then missed two largest number of them. How do we can estimate...
4. Help with statistics

Only statistics that you need to calculate for it are the means, standard deviations, and sample sizes. Here are the results: Nutrient Test statistic value P Value Calories 3.984 .000 Saturated Fat 7.613...
5. Help me w/ stat. project.

I'm a collage student and my final project is to research any topic, examining a single quantitative measurement and present the results. I'd like to research several aspects in regards to bulling. Such as how much has school bulling increased/decreased. If student victims of bulling graduated...
6. Parameters estimation.

It is known that a sample consisting of the values 12, 11.2, 13.5, 12.3, 13.8 and 11.9 comes from a population with density functionf (x, α, β) = ( β/ \α ) (1 /x ^{ β +1}), for x>=1, α>0, β>0. Estimate the values of α and β. Here I have two parameters, and values, do I have to derive first...
7. Making sense of the data...Data analysis

Dear Experts, I have data for a 12 months study done on 2 wastewater (Plant A and Plant B—Final Effluent and Discharge Point) treatment plants. Physiochemical (13 parameters tested) and Microbiological(bacterial) data were collected. Also there is the recommended standards against which all...

Hi Everyone, I've got an extra credit for my statistic for social science/psychology, and I've barely hitting the mark to get a pass. So I was given extra credit questions. but I don't really know how to do them. Hope someone could really help me on this! Thanks![/ATTACH]
9. a question in uniform distribution

suppose X1,…,Xn be random sample of U(0,θ) distribution. if X(n) be largest order statistics of sample, and V=nX¯/X(n), how can I calculate Var(3V−X(n)) X¯ is mean of sample.
10. Risk probability assesment

Your exam could be marked with a range of possible grades, simplified as on the following state diagram: Acceptable To begin with the chances are that you will pass with a standard result. Each 45 minutes (the time allocated for each answer) your grade could go up or down to a...
11. Matrix representation

A very new European “Rapid Reaction Force for Fire” has been created today and begins operation between three Countries “A”, “B” and “C”. It’s main resource is a super aircraft “Funderbird2” with a massive water cannon that even carries a small mini-submarine for fighting fires at sea...
12. How to I Calculate the Missing Values?

IQ-scores are standard-score transformed scores having a mean of 100 and a standard deviation of 15; SAT scores are standard-score transformed scores having a mean of 500 and a standard deviation of 100. In what follows, X refers to a raw score from a distribution with a mean of X and a standard...
13. Multiple Regression Help

Hello, I need help/advice with multiple regression analysis. I am looking at the degree of discrimination towards women in construction industry in terms of salary, promotional opportunity, harassment and psychological environment. Data that I have collected are -Age -Level of...
14. Need help with regression analysis

Hi everyone, I am kinda confused with regression analysis. My research is to investigate the degree and trend women in the construction industry suffer from lower wage and harassment. What I got here is a dependent variable (Salary) and independent variables 1. Gender 2. Years of working...
15. What asymmetric distribution represents this data?

Hello, I have this data: Bin particle_240 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 10 2 11 0 12 0 13 0 14 0 15 0 16 0 17 0 18 1 19 3 20 1 21 2 22 3 23 10 24 8 25 6 26 5 27 7 28 14 29 11 30 14 31 14 32 16 33 17 34 12 35 17 36 16 37 17 38 26 39 19 40 26...
16. compare two Beta coefficience between two different model.

I am running two regressions, each with the one independent variables (Y) but with two different dependent variables (X1, X2). examply: Y is central obesity, X1 is waist circumference, X2 is waist / hip ratio. I think the waist/hip ratio more good indicator than waist for central obesity...
17. PhD study

Dear individuals of intelligence, I would like to know if anyone can help choose the correct statistical test to carry out on my data that I have collected. Details are below: I tested 10 caucasian, 10 asian and 10 african individuals during a cold water immersion and measured their skin...
18. Which formula to use

Hi, I have 2 columns of numbers (x,y), I want to find which value in column X will give the maximum value in column Y. What formula does it? preferable ones that can be used in Excell or OO Calc. Thanks!
19. Comparing Survey Results

I just recently administered two surveys testing the effectiveness of a product. Each survey consisted of the same 3 questions and were answered on a 10-point Likert scale. Survey A was given to 20 participants before the product was administered and the answers to the questions were as...
20. Sst= ssw+ssb

Hi everyone, I have this problem to solve. It's been a while since I tried to figured out how to do, but I am totally lost. Here it is. Prove SST= SSW+SST in one-way Anova (one factor). Σ ( xi - x̄ )² = Σ (xi - x̄ + x̄ k - x̄ k ) ² Hint: Σ [ ( xi - x̄ k ) + ( x̄ k - x̄ )]² Where...