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# Forum: Statistics

Statistics course and homework discussion. Elementary statistics.

1. ### Sticky: We only provide homework help to those who show effort

Welcome to Talk Stats Forum. In order to keep homework help effective and efficient, we request all members to abide by these guidelines: 1)...

• Replies: 0
• Views: 66,617
09-30-2005, 09:44 AM
2. ### Sticky: Forum Guidelines: Smart posting behavior pays off

Welcome to talkstats.com, the place for statistics help. This is a guideline for people who want to ask a question on this forum and value a...

• Replies: 1
• Views: 196,558
07-16-2014, 11:01 AM
1. ### Confidence level vs Confidence Interval

I am getting really confused on the confidence level/confidence interval distinction. Most examples I see on the net pair off a 95% confidence...

• Replies: 9
• Views: 4,459
BGM
09-12-2013, 12:59 PM
2. ### Next step after my MANOVA

Hi everyone, sorry if this is a stupid question! I am doing a study into the effects of sleep deprivation on risk taking. I have one independent...

• Replies: 0
• Views: 3,356
07-18-2008, 01:33 PM
3. ### need help: ordinal data used as predictor for linear multiple regression analysis??

Part of my thesis tries to investigate the extent to which students "test Score" on the topic of electrical circuits in physic can be predicted from...

• Replies: 2
• Views: 1,162
05-12-2013, 11:35 PM
4. ### estimate a and b parameters.

I watched all of brandons foltz vids on his statistics playlist but for the life of me im stunned and i think due to the technical language barrier...

• Replies: 5
• Views: 1,869
BGM
09-09-2013, 11:57 AM
5. ### Problem- fluctuating negative control

Hi, I have what sounds to me like a simple question that I just want to hear some opinions on. I'm trying to quantify changes in gene expression...

• Replies: 0
• Views: 1,687
05-24-2007, 09:13 AM
6. ### Question on state space model

Hello, I am currently analyzing a paper on the evolution on the Union's and the Confederation's currency price in gold during the Civil War. The...

• Replies: 0
• Views: 847
05-12-2014, 11:15 AM
7. ### t (median) test for difference in means (medians)

I would like to ask if anyone can help in showing me how to perform the statistical test for the following scenario: There are four groups of data...

• Replies: 0
• Views: 3,770
01-25-2010, 03:01 AM
8. ### (bio)equivalence tests: acceptable difference

As you may know, (bio)equivalence tests are tests that are able to show equivalence between two compared groups, other than the more common tests...

• Replies: 0
• Views: 3,472
04-26-2007, 07:40 AM
9. ### Required sample size for Tolerance Intervals

What would be the minimum required sample size in order to construct a relevant Tolerance Interval? Are there any guidances out there that specify...

• Replies: 0
• Views: 4,197
03-16-2011, 10:57 AM
10. ### Statistics/Probability Question

I'm going over a study guide that I have for a test on Thursday and I'm having issues finding the answer to a "neither" question and I wanted to see...

• Replies: 1
• Views: 13,306
02-14-2009, 11:42 PM
11. ### normal distribution

Hello!! Thanks!

• Replies: 3
• Views: 2,409
04-06-2011, 11:04 AM
12. ### Unstable Fixed Points and Stable Fixed Points

Hello everybody! I am studying Chaotic Dynamics Theory, and I'm a little confused with stability analysis. In order to determine the stability...

• Replies: 0
• Views: 2,390
10-20-2011, 08:31 PM
13. ### Correlation Dimension

Hello everybody!! Again I'm here asking your help .... I'm looking for the procedure for the estimation of correlation dimension (chaos theory). ...

• Replies: 0
• Views: 1,435
10-31-2011, 05:05 AM
14. ### Correlation Integral

Hello everybody!! I'm here asking your help!!.... Can somebody explain me the correlation integral. I have tried to compute correlation dimension...

• Replies: 0
• Views: 1,860
11-09-2011, 12:41 AM
15. ### Parameters of Probability Density Functions

Hello! As part of a Probabilistic Distribution Study, I selected a number of distribution to fit the data and I already estimated their...

• Replies: 6
• Views: 2,833
BGM
11-10-2011, 10:06 AM
16. ### Data independent and identically distributed... How to prove it?

Hello everybody! I am running a frequency analysis of flood and wind speed, for which the data are assumed to be independent and identically...

• Replies: 3
• Views: 8,853
11-18-2011, 11:26 AM
17. ### Recommendation on Statistical Software

Hello everybody! Today I am asking your recommendation on statistical software. As part of a project I have to fit many distributions in order to...

• Replies: 0
• Views: 1,515
12-07-2011, 04:55 AM
18. ### Someone who can help me with EasyFit (Statistical Software)

Hello! As part of a project I am fitting many probability density distributions .... I am doing all it on excel (making each equation), but I am...

• Replies: 1
• Views: 2,197
BGM
12-08-2011, 04:02 AM
19. ### How to choose the best distribution among various distributions if.....?

How to choose the best distribution among various distributions if all meet the goodness of fit test (Kolmogorov Smirnov, Anderson Darling and...

• Replies: 4
• Views: 2,529
12-16-2011, 05:36 AM
20. ### P-Value

Hello everybody!! I feel sorry because my question is quite elemental.... but I've read about it and I don't understand well. I fitted my data to...

• Replies: 3
• Views: 3,015
01-09-2012, 05:21 PM
21. ### LogPearson 3 Parameters calculation

Hello! I am trying to calculate LogPearson 3 Distribution, to do that I am following the book Flood and Frequency Analysis by A. Ramachandra Rao.......

• Replies: 2
• Views: 1,726
01-03-2012, 04:32 AM
22. ### Latin Hypercube Sampling and Importance Sampling

Hello... I need help on Latin Hypercube Sampling and Importance Sampling. I don't know if this one is the correct forum to ask about it, but maybe...

• Replies: 3
• Views: 3,138
BGM
01-12-2012, 06:54 AM
23. ### Risk Analysis or Uncertainty Analysis Methods

Hello there! I have been studying risk analysis methods and uncertainty analysis methods, but I am not sure if MEAN VALUE FIRST-ORDER SECOND MOMENT...

• Replies: 0
• Views: 1,645
01-24-2012, 08:37 AM
24. ### Sampling Method and Uncertainty Analysis

Hello everyone! As part of a project, I have to run a uncertainty analysis: uncertainty factors (random variables) are reproduced by a proposed...

• Replies: 0
• Views: 1,376
01-18-2012, 05:27 AM
25. ### Sampling Methods

Hello everybody! Can you recommend me any program or excel add-in to reproduce uncertainty factors by sampling methods: latin hypercupe sampling,...

• Replies: 3
• Views: 2,032
01-18-2012, 11:25 AM
26. ### Monte Carlo Sampling...I would appreciate your help!

Hello! Sorry, I am new in the statistic area, so I have many doubts... I am trying to understand Monte Carlo Sampling Method. Although this...

• Replies: 0
• Views: 1,340
01-31-2012, 12:10 AM
27. ### Need help from someone who knows about importance sampling.

Hello! My question is about Importance Sampling. I am trying to apply a complex sampling method, which combine two sampling techniques. To do this,...

• Replies: 1
• Views: 2,339
01-31-2012, 08:14 PM
28. ### Desperately need help ..... Importance Sampling

Sorry for posting the question again, but I have made several questions about sampling methods but haven't received suggestions or ideas, and I...

• Replies: 0
• Views: 1,204
02-01-2012, 12:34 AM
29. ### Sampling Methods and Risk Analysis!

Hello, maybe someone can help me answering some questions about sampling methods and analysis of risk. Question 1) Is this correct?: The basic...

• Replies: 0
• Views: 1,378
02-05-2012, 08:43 PM
30. ### Rayleigh and Extreme Value Distribution Type II (Fretech Distribution)

Hello! I am looking for the equations to quantile estimation by Rayleigh, Extreme Value Type II Distributions (Frechet Distribution) and Weilbull...

• Replies: 3
• Views: 2,327
BGM
02-17-2012, 11:58 PM
31. ### Latin Hypercube - Monte Carlo Sampling ~ VBA CODE

Hello! Having no experience with writing VBA code, I seek your assistance. I am looking an example of VBA (or any other programming software) CODE...

• Replies: 0
• Views: 3,393
03-07-2012, 08:27 AM
32. ### Advice to improve Monte Carlo Simulation (Uncertainty Analysis)

Hello! Can anyone suggest me any method or technique to improve Monte Carlo Simulation (Sampling Method) on Uncertainty Analysis? Thanks! ~~

• Replies: 2
• Views: 1,609
03-14-2012, 04:20 AM
33. ### Multivariate regression equation

Hello everybody! Maybe someone can help me with this: I read in a notebook a statistical process, in which one of this steps says: Decide a...

• Replies: 1
• Views: 1,861
03-20-2012, 09:19 AM
34. ### How many times must be divided the CDF vertical axis in Latin Hypercube Sampling?

Hello! Please can someone help me with this? I am quite confused on how many times must be divided the CDF vertical axis in Latin Hypercube...

• Replies: 0
• Views: 1,249
03-22-2012, 01:52 AM
35. ### Frequency Factor K for the Log Pearson 3 distribution

Hello! I know some expressions for calculating K directly from Cs, such as: - Using table (maybe the best way, but require a manual process) -...

• Replies: 0
• Views: 4,047
03-23-2012, 02:35 AM
36. ### Monte Carlo Simulation - Distributions - Inverse CDF Method

I am doing a Monte Carlo Simulation for to types of time series data, each of them fit a different distribution (Gumbel Max and LogPearson Type III)....

• Replies: 0
• Views: 3,340
03-26-2012, 10:31 PM
37. ### Comparing Monte Carlo Sampling and Latin Hypercube Sampling

Hello everybody! Can someone help me with this?...:confused: I ran a risk model one time using Monte Carlo Sampling, and other time using Latin...

• Replies: 2
• Views: 2,083
04-12-2012, 10:09 AM
38. ### Statistical test for comparing percentage not mean

Hi, I am wondering what test should I use to compare two percentage value from two different observations. Let's say I have a damage of crop 15%...

• Replies: 2
• Views: 860
07-14-2017, 09:19 AM
39. ### comparing percentages

I appologize for posting this topic again, I wasn't able to apply previous answers to previous posts to my problem. My problem is this: I'm...

• Replies: 5
• Views: 6,813
05-28-2011, 08:03 PM
40. ### Determining which statistical test to use and how to figure out sample size

Hello, I'm looking to collect data for the organization that I work for (a senior retirement community management company) and draw correlations...

• Replies: 0
• Views: 3,122
11-05-2012, 05:32 PM
41. ### Help with Stats Assignment

I posted this in the Psych Stats area, but thought it might be better here ... any help or advice is greatly appreciated I came across this forum...

• Replies: 0
• Views: 876
04-06-2013, 10:17 PM
42. ### (SEM) Structural Modeling: identifying problems

Hello, I've received a homework at my UNI to resolve untill my exam (which is friday). It's about SEM. It is in form of a forum post and we need to...

• Replies: 2
• Views: 1,726
02-02-2015, 04:43 PM
43. ### Which test should I use for two unequal groups ?

Hi all! I have data that include 20 samples divided into 2 groups (category A and category B). The groups are independent, none of the value in...

• Replies: 11
• Views: 3,295
12-11-2016, 04:37 PM
44. ### Logistic regression - intepretation of results

Hi all, I have binary data for which 70% involve 1 (yes) and 30% involve 0 (no). I've done logistic regression in MedCalc. Results below: ...

• Replies: 5
• Views: 1,678
03-02-2017, 05:08 PM
45. ### Solution for Non-normally distributed data

hello there, I am doing some statistical analysis on medical sample data. I need to need to find variables which influences the length of stay in...

• Replies: 2
• Views: 1,208
11-30-2013, 06:33 AM
46. ### Problem: How many people should be interviewed by manager?

Guys sadly I almost have no experience in statistics, but I need to solve this problem today for my job application and I'm kinda lost. I would...

• Replies: 5
• Views: 2,824
06-13-2014, 07:58 AM
47. ### Help need on hypothesis testing

Hi All, This is my first post in this forum. So please excuse me if it is posted in wrong place or does not adhere to forum standard. I would soon...

• Replies: 3
• Views: 1,613
07-12-2013, 08:18 AM
48. ### Examining The Relationship Between Two Series

Hi Everyone First time post so please bear with me. I have two time series stretching several years of daily prices of two commodities, say gold...

• Replies: 0
• Views: 2,137
02-20-2009, 03:48 PM
49. ### Accounting for covariate in a mixed-model anova?

Dear all, I'm doing a study on changes in hydrogen in patients undergoing surgery. I have 2 groups of patients, and have taken 3 blood samples for...

• Replies: 0
• Views: 1,366
05-01-2012, 04:05 PM

I have this question: Men are eligible for this club if they are 74in tall. what percentage of men are eligible to join the club. also the mean of...

• Replies: 2
• Views: 4,892
12-20-2006, 04:28 PM
51. ### Cronbachs Alpha- Quick question, urgent help needed

Hi guys, hope you are all doing fine. I have an exam on monday and need to know how to calculate Cronbach's alpha. I know that you have to use...

• Replies: 1
• Views: 1,014
07-15-2017, 02:22 PM
52. ### Average Hours

We have the following data and we need to find average hours it takes to complete one item in CNC Item Quantity HOurs Applied Dept A 1 ...

• Replies: 3
• Views: 3,170
06-14-2007, 10:51 AM
53. ### Question on sample var/se and DoF

When you are calculating a sample's variance or standard error, you use (Sum(X - Xbar)^2)/(n-1), and the square root for SE. n-1 is the degree of...

• Replies: 4
• Views: 2,013
agp
12-27-2012, 09:23 AM
54. ### What test to use?

Let's say you are testing the affect of two things, A and B, on study subjects. One group of subjects is assigned to A, and the other is assigned to...

• Replies: 12
• Views: 2,360
01-04-2013, 04:00 PM

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