1. Announcement:
05-10-2017
Views:
1,767
Page 101 of 294 First ... 51 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 151 201 ... Last
Threads 6001 to 6060 of 17582

# 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: 66,594
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: 196,509
07-16-2014, 11:01 AM
1. ### umvu estimator

Let x1,x2,…,xn be a random sample from a poisson distribution with mean θ Find umvu estimator log(1+θ)

• Replies: 2
• Views: 4,859
06-16-2010, 12:30 PM
2. ### Mle

I am Hadi Sanji of university ferdowsi of iran. I have a problem about MLE . please guide me. Question : Let x_1, x_2,…, x_n be a random sample...

• Replies: 1
• Views: 2,333
06-19-2010, 01:29 PM
3. ### unbiased confidence interval

Hi let x1,x2,...,xn be a random sample from distribution in under function distribution . F(x)=^β , 0≤x<θ where β is unknown and θ is known find a...

• Replies: 2
• Views: 3,271
BGM
12-20-2011, 10:47 AM
4. ### Unsure on how to plot data..

We are doing an experiment in our lab, and it's fairly simple: we take five randomly selected rubberbands, and shoot each of them the same five...

• Replies: 0
• Views: 1,015
04-14-2013, 07:42 PM
5. ### Spearmans rho spss question

Hi A student has asked me the following question, although it seems simple it's ages since I've done anything correlational, so I would appreciate...

• Replies: 0
• Views: 2,370
03-04-2009, 08:25 AM
6. ### comparing two groups multiple datapoints for one parameter - how?

Hello, I have the following problem (example): I want to compare the size of apples for two sorts of apple trees. So I measure the diameter of...

• Replies: 0
• Views: 948
01-30-2013, 12:57 PM
7. ### Slovin's Formula

Who invented/formulated it? I already have done some research and all the results wasn't clear enough. I found one which states that Yamane's...

• Replies: 2
• Views: 3,568
06-19-2015, 04:43 PM
8. ### Newbie: Statistic help

Hello everyone, I reacenly found this forum while surfing google. Actually I need some help with my statistics work. I dont know how to...

• Replies: 2
• Views: 2,472
06-02-2010, 01:44 PM
9. ### My Textbook sucks, Can some one help me with this question.

Exactly from the book A distribution of numbers is approximately bell shaped. If the mean of the numbers is 125 and the standard deviation in 12,...

• Replies: 3
• Views: 5,752
06-08-2010, 10:41 AM
10. ### Min sample size for Wilcoxon Rank Sum test

Hi, I have data measurements (eg, running cost) that keep coming in to the system continuously. There are two groups (say X and Y) that I want to...

• Replies: 5
• Views: 7,723
08-22-2013, 01:00 PM
11. ### nominal (yes/no) and distance. What test to use to proof correlation?

Hi all, My boss has a list that shows the interest of people for a new venue (interest? Answer: yes or no) and the distance to that possible...

• Replies: 5
• Views: 1,128
04-21-2016, 08:48 AM
12. ### How to get from Confidence Interval to Percent Confidence Interval?

Thank you for your time with this... This is in relation to a stratified random sample. I have the confidence interval expressed as a range of...

• Replies: 0
• Views: 1,201
08-02-2014, 02:11 PM
13. ### KS Test - help with ties in R

We are trying to compare two samples that are not normally distributed. We're trying to use the KS test in R, but we get a warning saying that an...

• Replies: 1
• Views: 1,231
07-15-2014, 09:02 AM
14. ### KS test, non normality

We want to compare two continuous variables in R that are not normally distributed. As you can see, both variables contain a lot of zeros, whenever...

• Replies: 4
• Views: 2,042
07-15-2014, 10:24 AM
15. ### Help with the normal distribution using R

Hi! We are total statistics and R-newbies, and we're having some difficulties with our data that we hope some of you might be able to help us...

• Replies: 2
• Views: 1,444
06-25-2014, 05:58 AM
16. ### Help analyzing result from GLM with a poisson distribution

Can anyone help us analyse the results of this model? We're trying to test if gender ("koen") influences the occurrence of vocalizations see in pigs...

• Replies: 0
• Views: 827
07-17-2014, 09:07 AM
17. ### GLM, poisson distribution, R

Hi guys We've studied in total 60 groups of pigs (30 groups including male pigs, 30 groups of only females) for the occurrence of fighting...

• Replies: 2
• Views: 1,625
08-13-2014, 07:31 AM
18. ### Help with t-test and multiple variables

Hello We are working with a large set of data from pigs at slaughter in R. We have info on the gender of pigs and of the occurrence of specific...

• Replies: 2
• Views: 1,493
07-11-2014, 03:04 PM
19. ### Significance when there are no occurrences in one of the variables?

Hi guys! We've been studying the incidence of pigs mounting each other in a group of pigs containing entire male pigs, gilts and castrates and in...

• Replies: 3
• Views: 1,317
07-23-2014, 04:04 AM
20. ### Fit of generalized linear model (Poisson distribution)

Hi guys Can anyone tell us how to evaluate the fit of our generalized linear model with a poisson distribution? We can't really tell if the model...

• Replies: 1
• Views: 1,596
09-02-2014, 12:27 PM
21. ### How to analyse deviance (GLM in R)

Hi! This might be quite basic, but how do I analyse the fit of my GLM from the deviance? In the summary of my model, I get a deviance of 140.1...

• Replies: 0
• Views: 1,857
09-03-2014, 03:06 AM
22. ### Reliability of a questionnaire

Hi everybody, I have a problem with the reliability of my questionnaire (5-point Likert scale). I constructed 5 subscales for my questionnaire....

• Replies: 1
• Views: 2,764
02-25-2011, 10:23 AM
23. ### Hypothesis test help.

The temperature in degrees Fahrenheit of a random group of healthy adults are 97.0 97.4 99.3 97.7 98.6 99.7 97.5 98.7 96.9 97.9 97.3 ...

• Replies: 1
• Views: 1,228
03-06-2015, 04:46 PM
24. ### population proportions...

Hello, Suppose you have a problem to solve in which 71% of Internet users connect using standard telephone lines. The population proportion is...

• Replies: 3
• Views: 1,790
05-21-2006, 10:11 PM
25. ### I'm so lost on population variances!!

Hello, Suppose a company is making a product. They want a maximum variance of .0001 inches. Assume a sample size of 15 products has a standard...

• Replies: 0
• Views: 1,900
06-13-2006, 08:55 PM
26. ### How to present stat from Univariate Analysis of Variance

Hi, I am working on my latest paper and am having some problems with how to present results from Univariate Analysis of Variance made in spss. ...

• Replies: 0
• Views: 2,885
09-28-2011, 12:44 PM
27. ### Please assist me in Anova

I don't have a lot of knowledge on Stats. I recently ran an experiment looking at whether a drug is toxic or not by treating the animal and monitors...

• Replies: 4
• Views: 2,849
07-28-2009, 02:01 AM
28. ### Potato Chip Problem

There is a problem in all the statistics slides on line and I can not figure out how they arrived at their answer. A potato-chip producer wonders...

• Replies: 2
• Views: 1,227
10-21-2015, 05:33 AM
29. ### question about best point estimate and maximum error of the estimate

Hi, I am currently studying for my final exam in elementary statistics, and I just cannot figure out how to work this problem out, and there are...

• Replies: 0
• Views: 2,029
04-26-2011, 03:21 PM
30. ### comparison of several samples to one sample

hi guys, need some help with this problem. We are essentially comparing a consumption of coffe at home and abroad, what we have is the average...

• Replies: 1
• Views: 1,769
04-28-2011, 02:05 PM
31. ### Trying to display 3+ scaled variables in one table

Hello, I've been trying to display 3 variables that use the same scale with the same value labels in one table in SPSS V19 and have been...

• Replies: 1
• Views: 1,225
10-03-2012, 08:40 PM
32. ### Significance Test for Comparing two Proportions

I need some help comparing two proportions. I am currently doing research on the inhibiton of a particular phenotype by various chemicals. The...

• Replies: 11
• Views: 6,996
12-18-2010, 10:54 PM
33. ### urgent help required in stats

I need only explanation to these basic level questions for my son 1. The archaeological site of Tara is more than 4,000 years old. Tradition...

• Replies: 0
• Views: 8,943
07-15-2007, 09:31 PM
34. ### How to Compare the Difference of a Change in Proportions

I have patient data collected from intervention hospitals and control hospitals at two points in time. I am interested in looking at survival (and...

• Replies: 1
• Views: 930
08-21-2015, 02:36 AM
35. ### Effect Size Conversion Puzzle

Doing a meta-analysis with studies using diverse approaches to design and analysis. Trying to convert all effects to effect size d. For data that...

• Replies: 0
• Views: 1,277
01-15-2014, 09:46 AM
36. ### Understanding A Basic Probability

Hi everyone, I'm new here, so I apologize if this post is in the wrong forum or of incorrect format. So my question is; Assuming Person A has...

• Replies: 2
• Views: 1,073
05-06-2016, 02:30 PM
37. ### How to do this question!

Many colleges and universities hold a “blood drive” for organizations such as the Red Cross. To help with the planning of an upcoming blood drive,...

• Replies: 1
• Views: 1,163
11-28-2012, 10:24 AM
38. ### Can someone help with this question ?

The Ledd Pipe Company has received a large shipment of pipes, and a quality control inspector wishes to estimate the average diameter of these...

• Replies: 1
• Views: 1,286
11-28-2012, 11:13 AM
39. ### Non-parametric tests for repeated measures data

Hi, I'm having difficulty finding an appropriate test for my data. The experiment is looking at the distance animals have moved from a...

• Replies: 4
• Views: 1,789
11-02-2015, 02:56 AM
40. ### Help deciding what test to use?

Hi all, I'm a bit confused on deciding what test to used to analyze some survey results. I have two conditions, those that do X1 and those that do...

• Replies: 2
• Views: 2,259
04-11-2012, 02:42 PM
41. ### How to find the expectation of x^1/2 ?

Hi all, I am trying to find the expectation of x^1/2 where x~N(a,b) ( Normal with mean a and variance b). Any feedback would be highly...

• Replies: 2
• Views: 3,292
04-14-2010, 02:10 AM
42. ### simple normal distribution question

Hello, studying for a test and need to make sure.. If X1 - X2 ~ N(0, 2 sigma^2), how do I convert them to N(0,1)? What is the general formula for...

• Replies: 10
• Views: 3,357
04-25-2009, 11:07 AM
43. ### finding p-value

I'm doing a question and I'd appreciate some help.. Q) random sample of 26 victoria college students taken, and their SAT scored recorded. sample...

• Replies: 5
• Views: 4,308
04-25-2009, 04:23 PM
44. ### Why is Z0.05 = 1.645?

I'm using a standard normal table from back of my text, and I can't find 1.645 anywhere. If anything, shouldn't it be 0.4801? What am I missing?...

• Replies: 2
• Views: 130,665
04-25-2009, 02:09 PM
45. ### types of test statistics

Can anyone help me WHY we are using certain tests/CI's for certain cases? I get some of them but not all. Thanks. Q) random sample of 26 students...

• Replies: 2
• Views: 3,205
04-26-2009, 11:54 AM
46. ### relationship between CI and sample sizes

Say two items both have normal distribution with same variance. Sample sizes are 13 and 18 respectively.. say we find 98% CI for the difference...

• Replies: 2
• Views: 1,912
05-19-2009, 05:54 AM
47. ### using different test statistics (in general)

How do I know when to use test statistic of Chi-square, T, F, Z? I know we can use T when distribution is normal and n < 30.. what about others?

• Replies: 1
• Views: 1,747
04-27-2009, 02:45 PM
48. ### Variance in simple linear regression model

it's that time of the year again (exams) and I was looking for some help. Consider the simple linear regression model Yi = β0 + β1Xi + ϵi ϵi's...

• Replies: 5
• Views: 7,005
06-21-2009, 09:53 PM
49. ### finding p-value from F distribution table

Sorry if I'm creating too many threads, this will be the last (before the test). I'm doing hypothesis test for multi-regression model, and I need...

• Replies: 3
• Views: 87,274
07-26-2012, 10:34 PM
50. ### 0.025 quantile from standard normal dist. is

1.96. Can anyone tell me how we get this number? This is related to Wald test. I don't know how I can calculate 0.025 upper quantile from...

• Replies: 1
• Views: 5,713
BGM
02-23-2010, 02:21 AM
51. ### finding p-value when F-value and df's are known

Websites like this: http://www.danielsoper.com/statcalc/calc07.aspx gives you exact p-value when u enter F-value, and df's. Is there any way we can...

• Replies: 3
• Views: 9,374
02-24-2010, 05:30 AM
52. ### perfect fit model and making inferences

In linear regression, if model fits data perfectly, then it's impossible to carry out inference on the parameters. I understand this part. However,...

• Replies: 1
• Views: 1,988
03-11-2010, 02:22 PM
53. ### how would you replicate/randomize this study?

We want to study the effect of 3 types of pots (aluminum, clay and iron pots) on the food's mean iron content. We have 15 different foods available...

• Replies: 4
• Views: 2,542
03-28-2010, 09:21 PM
54. ### how to deal with same AIC for compound symmetry and AR(1)?

In 3 covariance structures (compound symmetry, AR(1), unstructured), we know that lower the AIC the better.. but what do you do if AIC for compound...

• Replies: 3
• Views: 3,030
03-30-2010, 11:47 AM
55. ### lost about locating info.

:confused: I would appreciate any help on locating specific examples where businesses can effectively use statiscal tools. I have found great...

• Replies: 2
• Views: 3,030
11-13-2005, 03:45 PM
56. ### glm repeated measures

Hello all, I am running a repeated measures analyses, with a continuous set of variables, but I want to compare between 4 groups (ordinal...

• Replies: 0
• Views: 924
05-21-2016, 05:55 PM
57. ### what is the difference between formative models vs reflective models ?

Hello Can someone explain to me with easy example to make me understand the difference between formative and reflective models ?

• Replies: 1
• Views: 3,601
11-26-2014, 02:55 PM
58. ### How to calculate sample size manually ?

Hello If My Confidence Level = 95% Margin of error = 5% Number of observation = 211 How can i calculate the sample size ? Can someone...

• Replies: 2
• Views: 2,544
12-14-2014, 11:40 AM
59. ### -->(BOX-COX) Transformation breaks down for large (positive) coefficient values <--

Hi, I have done a box-cox transformation of my response variable, using the following formula: (Y^lambda - 1)/lambda Previously, I have got some...

• Replies: 0
• Views: 1,375
06-07-2013, 04:05 AM

Use this control to limit the display of threads to those newer than the specified time frame.

Allows you to choose the data by which the thread list will be sorted.

Note: when sorting by date, 'descending order' will show the newest results first.