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# Forum: Statistics

Statistics course and homework discussion. Elementary statistics.

1. ### 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: 200,392
07-16-2014, 11:01 AM
2. ### 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: 68,590
09-30-2005, 09:44 AM
1. ### Bayesian Statistics Question

My current state is that I am clueless and have no idea what to do with it. Could somebody provide me some knowledge of how to start with this?

• Replies: 51
• Views: 9,604
12-12-2011, 11:49 AM
2. ### Likert Scale (1-5) statistical analysis

Hi, I have done my search on this website and google and have found my statistical test to be either t-test or chi-square so I'd like you guys to...

• Replies: 47
• Views: 13,942
07-23-2012, 07:29 PM
3. ### A fundamental question!

First sorry for my first-grade English! If you are OK with it, please read on. Second, sorry that my question is so basic, but sometimes I see...

• Replies: 45
• Views: 15,035
01-25-2012, 05:57 AM
4. ### Posterior Distribution

Suppose I have X_{1}..X_{n} which are i.i.d as Bernoulli random variables with P(X_{i} = 1) = \frac{e^\theta}{1+e^\theta} and the prior is normal...

• Replies: 37
• Views: 6,857
BGM
12-16-2011, 12:45 PM
5. ### How to Determine if 2 variables are dependent?

I'm trying to figure out whether or not citation flow and trust flow are independent of each other (here is the article containing the data:...

• Replies: 37
• Views: 25,442
07-31-2012, 05:46 PM
6. ### Pop corn vs Chocolate. Which statistical test?

Hello all. I have a couple of questions regarding what statistical tests to use for a three-part problem. I would very much appreciate any help....

• Replies: 37
• Views: 7,799
01-01-2015, 02:57 PM
7. ### $60 - tutor wanted$60 an hour. R code Logistic and Poisson Regression Central Limit Theorem ANOVA Single, two pop tests Simple and Multiple Linear Regression...

• Replies: 36
• Views: 8,823
12-03-2011, 01:44 PM
8. ### Meanings of a set of data

Hi, My name is ngungo, means innocent or ignorant, and I am new here. I am a retired Computer Process Control Engineer. I had few statistics...

• Replies: 36
• Views: 8,686
07-10-2012, 07:11 PM

Please can someone help me with my analysis of data in my Masters dissertation? I have conducted a quantitative self-questionnaire in my...

• Replies: 36
• Views: 7,262
08-14-2012, 07:27 PM
10. ### Logistic Regression - How to interpret a Exp(b)= 0

Hi all, I'm working on a project and keep getting caught up with how to interpret my results. I've found lots of info on how to interpret...

• Replies: 32
• Views: 27,987
05-03-2013, 04:45 AM
11. ### 50$$to the person who can help me answer 3 questions. willing to paypal 50$$\$ to the person who can help me answer 3 questions. :) 1, The mean weight of 9 randomly selected 5 years old boys babies...

• Replies: 31
• Views: 8,159
02-08-2012, 08:55 AM
12. ### Distribution of MLE

Hey guys how are you? I have the following question: Let X1,X2,...,Xn be a random sample from a Pareto distribution having pdf f(x|b)=...

• Replies: 30
• Views: 9,482
10-30-2011, 04:53 PM
13. ### Finding the Sufficient Statistic of Weibull Distribution.

So I have a Weibull Distribution with two parameters with the following pdf: f(x/\alpha,\beta) = \frac{\beta}{\alpha^\beta} x^{\beta-1} exp ...

• Replies: 28
• Views: 18,203
BGM
12-05-2011, 04:29 PM
14. ### Regression diagnostics with proc glm or proc reg

I fit my model using 'proc glm' but now it seems that proc reg should be used for the diagnostics. So, do I need to fit the model all over again...

• Replies: 28
• Views: 18,109
02-13-2012, 01:43 PM
15. ### parameter estimation based on observed survival probabilities

Say 100 samples have been pulled from a Normal distribution with unknown mean and variance. All I know about the results are the following: • 23...

• Replies: 28
• Views: 5,421
10-28-2014, 04:39 PM
16. ### Correlational design using nominal/ordinal data

I have a problem that I've been struggling with for some time now. I can't find a standard, non-parametric test that seems to deal with this type of...

• Replies: 27
• Views: 12,005
02-03-2012, 08:30 AM
17. ### Hypothesis-test: difference between paired means

Dear All, I have a doubt about the theory of matched pair t-test. I have the difference between two means and I wanna do an hyphothesis-test...

• Replies: 27
• Views: 6,312
07-13-2013, 05:54 AM

I have my book which is sort of like Greek to me, but I have read the chapter several times, and tried to work some of the problems, but the examples...

• Replies: 26
• Views: 10,709
05-19-2008, 11:23 PM
19. ### Consistent Estimators and Consistency in Mean Square

Hello, I have an estimator \hat\theta = f(X) and I know that f(X) has two possible values under this probability function: P(f(X) = \theta /...

• Replies: 26
• Views: 7,827
12-02-2011, 12:12 PM
20. ### Multiple samples of different size and not normally distributed: how to compare/sort?

Dason, if you or anyone else try to change my posts again, I will sue you and this forum for calumny, because you are not authorized by law to...

• Replies: 26
• Views: 7,586
08-27-2012, 09:22 AM
21. ### differences between frequencies

Dear all, I'm trying to figure out how to best determine if there is a significant differences between how often a particular answer to a question...

• Replies: 26
• Views: 4,789
09-12-2012, 03:41 AM
22. ### How can I find out, if subscales are independent?

I need to find out, if four subscales of a scale a independent from each other in my sample. A correlation with all four is a good start, so I did...

• Replies: 26
• Views: 8,754
05-06-2015, 10:44 AM
23. ### Cronbach Alpha vs Pearson r

Hi all, this might sound like a completely amateurish question but...what is the practical difference between cronbach's alpha and the Pearson...

• Replies: 25
• Views: 40,215
01-25-2015, 05:51 AM
24. ### tests for normal data

Hi, I posted some like my questions, but I didn't stay very clearly with my problem. I have some rows of data like 1 0 2 1 3 0 I need...

• Replies: 25
• Views: 7,265
05-07-2013, 10:27 AM
25. ### Data analysis - which test is best

I would like to know which test would be appropriate for testing my hypothesis. I am doing a research project on parasitic infections in snail...

• Replies: 25
• Views: 4,561
04-25-2013, 09:29 AM
26. ### What to do when the predictors are not what I expected (when the model is fine)?

I would try to clarify the problem and then ask the questions. The problem (variable names are masked due to confidentiality): I ran a binary...

• Replies: 24
• Views: 5,002
02-12-2013, 11:16 AM
27. ### Comparing Fs

Hi ya'll How do you compare Fs (or Ts)? I know how to compare r-values and r2 values - but what if I have two Fs? How do I know if one is sig...

• Replies: 23
• Views: 6,820
02-03-2009, 02:00 PM
28. ### New to stats. Need help.

Alright this is a question from my stats class, I'm sure most will find it basic , however im not sure if i'm on the right track or completely off. ...

• Replies: 23
• Views: 7,016
BGM
09-26-2009, 02:19 PM
29. ### comparing the DEGREE of difference between data sets

Hi all, I'm wondering if there is a way to assess the degree of difference between data sets. For instance, say I have 4 groups of proportions (or...

• Replies: 23
• Views: 12,879
01-14-2011, 02:34 AM
30. ### Finding Standard Deviation

Hello everyone. I am new here, so excuse me if I sound a little too noobish. I am currently faced with the current problem on my homework. It isn't...

• Replies: 23
• Views: 12,542
BGM
12-06-2011, 02:48 AM
31. ### tests of normality

Hi. How can I test normality of data? Which is the best tests?

• Replies: 23
• Views: 4,915
04-18-2013, 02:40 AM
32. ### gamma-function

gamma-function g(t) = ymax * t^(alpha) * exp( alpha * (1-t)) With known ymax and alpha, what is the maximum slope of g(t) (with t>0)?

• Replies: 23
• Views: 4,453
05-28-2013, 02:20 PM
33. ### how do i approach this problem?

how do i approach this problem? thanks in advance.

• Replies: 23
• Views: 3,976
03-31-2014, 08:37 AM
34. ### Is the dice normal?

there are 2 dices in a box. one is normal, another is not normal. i select one, and throw 300 times, get the result as below: question: is that...

• Replies: 23
• Views: 6,957
10-06-2014, 06:19 AM
35. ### Sum of Squares help!

My homework problem says: For the following summary statistics, find ∑X and SS (sum of squares) a. XBar = 25, s = 10, n = 11 So, I think...

• Replies: 23
• Views: 4,679
09-07-2015, 08:37 PM
36. ### Multivariate Regression - I think!

Hi, I'm performing a psychological study about gender differences in attraction. Participants select between a number of figures that vary in...

• Replies: 22
• Views: 8,643
03-03-2006, 12:28 PM
37. ### 4 groups test - is it possible?

My problem - I have conducted an experiment which grows Water Cress in 6 different growing mediums (sand, gravel, stone, peat, compost,...

• Replies: 22
• Views: 4,858
03-10-2008, 11:31 AM
38. ### P value interpretation

Hi , I am having a hard time understanding the concept of p value and also its interpretation. I know that I can interpret a p value of 0.80 as...

• Replies: 22
• Views: 40,883
11-28-2011, 02:45 PM
39. ### Hi! im looking for which advance data analysis is actually helpful to real life.

Hi! I really really need real life examples of how and which advance data analysis you personally can use to help in your life. so no basic stuff...

• Replies: 22
• Views: 4,496
02-17-2013, 12:36 AM
40. ### Prediciting accidents

I have some data which measures the amount of hazard inspections completed in a workplace. I want to find whether there is a relationship between the...

• Replies: 22
• Views: 3,749
04-29-2014, 05:10 AM
41. ### Is it better if it isn't statistically significant?

So I am having a discussion with a colleague about a paper that we are writing. We have some results that has 3 levels of 1 Factor (A, B, and C). ...

• Replies: 22
• Views: 5,217
06-30-2015, 09:02 AM
42. ### Doubt on statistical test

Hi, my perception test presents one stimulus at a time and the listener has to choose one from three possible answers. There are 5 stimuli...

• Replies: 22
• Views: 4,553
08-25-2016, 04:12 PM
43. ### inferential statistics

In a recent national survey, the mean weekly allowance for a nine year old child from his parents was reported to be 3.65. A random sample of 45 nine...

• Replies: 21
• Views: 6,205
03-20-2008, 10:12 AM
44. ### Median with "tied values"

Hi all, My first stats course was almost 20 years ago. I'm starting again and have come across a calculation for median that I've never seen...

• Replies: 21
• Views: 10,704
11-20-2011, 02:07 PM
45. ### please i need help in solving these questions

hi all, please can anyone help me :( 1. The internal auditing staff of an local manufacturing company performs a sample audit each quarter to...

• Replies: 21
• Views: 11,342
BGM
12-10-2011, 04:57 PM
46. ### when to use the median and when the mean ?

Good morning, I have an assignment, I need to specify with examples, in which situation the mean is the best central measure and in which the...

• Replies: 21
• Views: 9,323
01-08-2012, 01:25 PM
47. ### Is this approach permissible?

Hello everyone, I am not so familiar with statistics but I have a question concerning the computation of a variable. I have collected data on...

• Replies: 21
• Views: 4,346
07-17-2012, 11:54 AM

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