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Threads 1081 to 1140 of 3194

# Forum: Statistical Research

Statistical theory and methodology. Mathematical statistics. Parametric inference. Nonparametric inference.

1. ### Sticky: Proof of the day

In this thread we post one (or more if you can't wait) proof a day. I'll start by proving the that V=\sigma^2(X'X)^{-1} in the linear...

• Replies: 14
• Views: 18,786
10-11-2014, 12:02 PM
1. ### HI what does the alpha sign mean?

it says, such and such variable (6 items, "alpha sign" = .88) is a measure of .......

• Replies: 0
• Views: 1,959
10-06-2011, 01:48 AM
2. ### ploting a graph in excel

Hi I am reading an article about plotting graphs on excel: core.ecu.edu/psyc/wuenschk/stathelp/Excel-ErrorBars.doc In the document it says: ...

• Replies: 1
• Views: 1,804
10-07-2011, 09:09 AM
3. ### Do you know how you can solve this

I want to plot a graph of the mean of two groups in the experiment. They have different mean, different standard deviation. The interval bars that...

• Replies: 0
• Views: 1,810
10-07-2011, 05:22 PM
4. ### 95% ci

Hi I am trying to interpret a journal article about the results of whether drinking cokes leads to child hyperactivity, the sample taken from a...

• Replies: 2
• Views: 2,443
10-24-2011, 08:25 AM
5. ### How to analyse 5-point likert data with different questions under 1 subset?

I am working on a research assignment, and has received enough data for analysis In the project, I used health belief model (HBM) to investigate...

• Replies: 1
• Views: 2,269
10-01-2015, 08:23 AM
6. ### Unbalanced samples

Hi! I want to compare between two sample, but they have non equivalent means between demographic parameters such as age and more. What do you...

• Replies: 1
• Views: 1,375
07-18-2016, 08:12 AM
7. ### How i can analyse two questionnaires to find the Reliability Coefficient

I am working on a project in which i am comparing Public and Private schools performance for that I have to compare the data on SPSS to find the...

• Replies: 0
• Views: 1,733
06-26-2016, 04:35 PM
8. ### Data analysis

Hi, please can someone help me out. I would like to know if I have performed the correct analysis for my study. I am comparing direct response...

• Replies: 0
• Views: 3,343
11-21-2016, 01:51 PM
9. ### which statistical test to use in spss

I have a variable (dependent) and five independent variables. How can I test if the five variables affect the dependent variable? Which test should...

• Replies: 1
• Views: 5,856
03-03-2011, 08:56 PM
10. ### 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...

• Replies: 6
• Views: 3,155
11-18-2014, 03:01 AM
11. ### What should i do after factor analysis output ?

Hello, I am having a construct name trust that includes the following constructs: 1 - Benevolence ( 3 Items) 2 - Integrity ( 6 Items ) 3 -...

• Replies: 3
• Views: 3,244
11-20-2014, 09:10 PM
12. ### Best factor analysis settings in SPSS ?

Hello Where i can get the best setting for factor analysis in spss for descriptives, extractions, rotations, scores, and options. I dont mind...

• Replies: 1
• Views: 1,989
11-24-2014, 11:17 AM
13. ### Which analysis i should use to test/support hypothsis ?

Hello Can someone tell me which type of analysis I should use to test hypothesis ? Which analysis best show me measure between 2 constructs ?

• Replies: 5
• Views: 1,835
12-01-2014, 11:49 PM
14. ### Accept Null hypothesis VS Reject Null hypothesis ?

• Replies: 5
• Views: 4,086
12-03-2014, 05:38 AM
15. ### How to alculate cross loadings of each item in SPSS ?

Hello Can someone give me the way to do it in SPSS

• Replies: 0
• Views: 1,521
12-20-2014, 12:04 AM
16. ### Poll: weight construction in DEA analysis

Hi, I hava a problem with weight construction in Data envelopment analysis. My goal is to construct weights that reflects the reality of my data....

• Replies: 0
• Views: 976
05-08-2013, 04:46 AM
17. ### RCT with several follow-up measures. How to counterbalance the dependent variable?

Hi everyone, I am new here so I hope I post this in the right Sub! Please let me know if there is a better Sub for it- I appreciate your help!! :)...

• Replies: 0
• Views: 1,426
08-20-2015, 07:22 AM
18. ### What to review before starting a PhD in statistics?

Hello everyone, I will be starting a PhD program soon on a topic mainly related to bayesian statistics, sequential Monte-Carlo methods and...

• Replies: 1
• Views: 1,155
02-27-2013, 10:55 AM
19. ### [ask] estimate the word "precision" from statistical book by using cluster sampling

hi everyone, i have been a task about how to estimate the word "precision" from statistical book by using cluster sampling. plz help me, i've been...

• Replies: 3
• Views: 1,679
04-23-2013, 07:03 AM
20. ### help with finding corelation of 2 variable data

Hi all This is my first post May be this is a dumb question but I need quick help please I have data for 95 people Outcome scored by doctors...

• Replies: 0
• Views: 2,003
04-17-2015, 12:46 PM
21. ### Significant Difference with 2 vars

Hi everyone, Is it at all possible to determine if a group of points on a scatterplot are significantly different from another group of points? ...

• Replies: 7
• Views: 3,792
06-25-2010, 11:03 AM
22. ### need help in determining appropriate sample size

Hi: I need help in calculating Sample size for my study. I am aiming to collect survey response for leadership study from different firms located...

• Replies: 0
• Views: 1,789
05-01-2011, 12:56 AM
23. ### No idea how to perform my statistical analysis...

Hello everybody! I'm new here... I'm really need help with this issue... Now I am so lost that I do have no idea how to do the stats for one of my...

• Replies: 7
• Views: 2,610
09-18-2012, 09:55 AM
24. ### Gaussian Processes - Wiener process - The drunk particle

Hello, I recently read about Gaussian Processes (http://en.wikipedia.org/wiki/Gaussian_process) for non linear regression. I am not an expert but...

• Replies: 0
• Views: 2,262
03-04-2013, 12:21 PM
25. ### Optimal combination of conditions

I am looking to find an efficient process to determine the set of conditions that results in the optimal likelihood of accomplishing some task. ...

• Replies: 12
• Views: 4,411
02-06-2011, 02:55 PM
26. ### does the following interaction make sense?

Hello, I have a problem, it would be great if someone could help me with it. I m analyzing a sample of patients with eating disorders (anorexia ,...

• Replies: 0
• Views: 1,364
06-21-2012, 01:12 AM
27. ### dummy*continous interaction- sig. main effect, non-significant interaction

Hi all, I would be grateful if someone could give me advice on the following topic: I estimated a glm and formed an interaction term out of a...

• Replies: 0
• Views: 1,856
06-28-2012, 05:33 PM
28. ### Simple or Factorial Experiment Could I Chose?

Dear, friends, scientests, and researchers I conducted an experiment to study two factors, first was irrigation method (I) which consisted 2...

• Replies: 1
• Views: 1,279
12-28-2015, 09:00 AM
29. ### Can I use Partial Eta Squared for t-tests?

Hi, I am currently trying to decide which effect size is the most appropriate for my results. I have conducted a repeated measures ANOVA, there...

• Replies: 0
• Views: 1,157
05-22-2015, 05:47 AM

:eek: Please any kind person help, as I am horribly stuck!!! I have a *very* large dataset (n>300,000 rows) of water readings in this format; ...

• Replies: 2
• Views: 2,234
03-23-2010, 10:43 PM
31. ### Determining Sample Size for Quality Audit

I hope I am posting this to the right section, I really have no idea about statistics. I work for a healthcare company working in residential...

• Replies: 0
• Views: 2,019
07-11-2014, 03:01 AM
32. ### Relevance of covariates?

I have a big group A of individuals that have one common characteristic that make them part of a study in which certain binary variable has to be...

• Replies: 2
• Views: 237
10-11-2017, 10:37 AM
33. ### Calculating and interpreting Spearman's Rank Correlation...

Hi. I am completing an undergraduate research project and am having a bit of trouble completing the statistical analysis. I'll briefly run through...

• Replies: 1
• Views: 5,863
12-04-2010, 04:15 AM
34. ### Zero vs missing data

Hello I have a question regarding 0 (=zero) vs missing data. If I have an observation that have many variables but one of the variable is not...

• Replies: 3
• Views: 1,045
08-29-2016, 03:12 AM
35. ### how to calculate the propagated error

Hello, I have difficulties in calcuating the propagated error of my variable x and was hoping that someone knows. My variable x is calculated...

• Replies: 0
• Views: 493
06-26-2013, 08:09 AM
36. ### Choosing a model for categorical data

Hi all, I'm not very familiar with working with categorical data. I would like to model a categorical response variable (nominal, three levels) as a...

• Replies: 2
• Views: 2,653
03-17-2010, 03:59 PM
37. ### Beta error

Hey guys I really need help from you to calculate the beta error of two different samples. The values are: Average rate of the first sample:...

• Replies: 0
• Views: 694
12-09-2013, 09:08 AM
38. ### Using chi-squared test for goodness of fit for different sizes of sample?

Firstly, apologies if I'm posting this in completely the wrong place. I'm trying to figure out a way to allow for different sized samples when...

• Replies: 1
• Views: 3,857
10-28-2011, 03:34 PM
39. ### God you people are clever!

Hi, :wave: I'm collecting data from a single group of 15 participants showing their improvement in a 5 stage levelled test before and after an...

• Replies: 5
• Views: 5,063
05-08-2010, 12:52 AM
40. ### To combine or not to combine standard deviations?

Hi, I'm testing the effect of 115 Chinese herbs on bacterial biofilms. I have been carrying out my experiment in microtiter plates and...

• Replies: 3
• Views: 2,009
10-14-2012, 12:15 AM
41. ### Complementary log log

Hi I have a model with a binomial error distribution. Instead of the logit link I use the complementary log log. What is the interpretation of...

• Replies: 1
• Views: 4,780
02-12-2009, 04:09 PM
42. ### What Analysis tools should I use in SPSS?

I am trying to work through some research issues and NOT a stats major. I have all the data and using SPSS. My research question is to determine...

• Replies: 1
• Views: 1,958
12-08-2014, 03:04 AM
43. ### What method to use for my research

Hello all, thank you for taking the time to read this! I have the following statistics problem. I am have a small number of documents from...

• Replies: 0
• Views: 537
04-17-2013, 03:50 AM
44. ### Parametric t-tests for individual / portfolio stock returns

Hello everyone, I am relatively rookie with statistical tests and I am trying to perform a parametric t-test for stock returns as follows. I have...

• Replies: 2
• Views: 3,433
12-21-2016, 10:22 AM
45. ### Likert scale analysis

Hi all! I want to ask that i have likert scale questionnaire with 6 points scale. If i am going to analyze using as interval data, that means i have...

• Replies: 0
• Views: 3,966
02-15-2011, 08:13 AM
46. ### Appropriate analyses for social psychological study of relationships

Hi, I collected cross-sectional data on personality and attitude variables for a social psychology research project and now I will be doing the...

• Replies: 0
• Views: 724
01-26-2014, 02:05 PM
47. ### question about null hypothesis??

here is my question: in my minor thesis, based on my theoretical framework, i have a hypothesis that stated that: "the score of group A is the same...

• Replies: 7
• Views: 3,009
01-27-2012, 04:37 AM
48. ### Help with thesis research on social bookmarking

Hi, I'm writing my thesis right now and I must admit that I underestimated the complexity of the required statistics a bit. My description is quite...

• Replies: 1
• Views: 2,690
11-07-2008, 09:54 PM
49. ### Jackknife

I tried to find a specific example of an application of the 'jackknife' command on google, but didn't find any so far. Someone has one? For...

• Replies: 2
• Views: 4,726
03-15-2009, 10:11 AM
50. ### Fuzzy RDD in Stata with two cutoff points

Dear all, i am running a Fuzzy Regression Discontinuity Design using 2SLS in Stata. My question is basically if i specified the model (and most...

• Replies: 0
• Views: 317
08-20-2017, 03:02 PM
51. ### HLM or MANOVA/MANCOVA

Hello, For my study, I will use a data set that includes 22 schools, 2 to 20 teachers in each school, and 4 students from each teachers'...

• Replies: 0
• Views: 3,081
HHH
11-11-2014, 10:27 AM

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