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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: 197,262
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: 67,029
09-30-2005, 09:44 AM
1. ### Transforming the data

Hello! I can't understand: In order to transform the data to make it appear more linear, how can I choose what transformation to use, if I don't...

• Replies: 8
• Views: 5,046
11-27-2005, 10:40 PM

QUESTION- THE DRUG AZT WAS THE 1ST EFFECTIVE TREATMET FOR AID. AN IMPORTANT MEDICAL EXPERIMENT DEMONSTRATED THAT REGULAR DOSES OF AZT DELAY THE ONSET...

• Replies: 8
• Views: 4,132
01-19-2006, 07:54 PM
3. ### Statistics question

Hi there, I have a stats question regarding a project I'm working on that I do not have the answer to and I would be grateful if anyone can help...

• Replies: 8
• Views: 3,555
03-04-2006, 10:38 PM
4. ### Nonparametric test choice for skewed data

Hello, My first thread on the board... I posted this to the SPSS-X list , but thought this forum may be more appropriate. I was wondering if...

• Replies: 8
• Views: 9,850
01-12-2007, 04:05 PM
5. ### Dealing with nonresponses

What can be done to compensate nonresponses in the sample (Aside from eliminating them, that is.)? Should they always be excluded from the sample...

• Replies: 8
• Views: 2,959
03-08-2006, 11:42 PM
6. ### R value Anova

Hi all can someone tell me when we are assessing the significance vlaue in ANOVA, do we measure it against the adjusted R value provided at the...

• Replies: 8
• Views: 3,915
05-12-2006, 09:16 AM
7. ### 95% confidence interval help

How much money does the average professional football fan spend on food at a single football game? That question was posed to ten randomly selected...

• Replies: 8
• Views: 9,175
10-25-2006, 09:36 PM
8. ### Might be a silly question about t-tests but...

...i really need some advice about how to go about comparing some means. Basically, I have the means and standard deviations for three different...

• Replies: 8
• Views: 3,068
11-10-2006, 01:33 PM
9. ### Converting scores to a metric

Scores for the AAT are reported with a mean of 80 and a standard deviation of 8. Martina received a raw score of 84 on the math portion of the AAT. ...

• Replies: 8
• Views: 4,205
06-18-2007, 12:48 PM
10. ### Data Transformation

Hello, I have a huge amount of data derived from replicated simulations. If I plot a frequency chart I have a distribution that looks like a...

• Replies: 8
• Views: 3,713
08-28-2007, 06:49 PM
11. ### Help - what type of test do I use

Hello, I am trying to analyze survey data for my thesis. One of my hypothesis states that there is agreement among respondents on different...

• Replies: 8
• Views: 3,402
03-05-2008, 08:03 PM
12. ### Exponential PDFS

Hey, I need some help with the below questions, any help would be great. Thanks. The length of time in minutes, Y, that a customer spends in line...

• Replies: 8
• Views: 83,200
04-23-2008, 06:10 AM
13. ### I want large set of data

Hello every body; Do any 1 here knows where can I find a large set of data? I mean a big set of data to analyze it in my project any help...

• Replies: 8
• Views: 4,444
05-29-2008, 08:08 AM
14. ### Quick question about sample size

Gentlemen, I have recently starting working in a call center environment. All our incentives, bonuses, and quality scores are based on 30 calls...

• Replies: 8
• Views: 2,985
07-12-2008, 05:44 AM
15. ### Check my answer, v2 | Correlation coefficients.

Me again! Id like to say thanks so far to all those who've helped me :) Got this question on coefficients, ive answered what ithink is good, but...

• Replies: 8
• Views: 4,079
08-17-2008, 02:46 PM
16. ### Help with interpreting P Value

I am stuck with trying to analyse some test result. Ive done a two sample tests similar to a t test (but its for ordinal variables so compares...

• Replies: 8
• Views: 3,968
08-23-2008, 08:49 AM
17. ### Standard error - why sqrt of n?

I happened to be browsing through some standard explanations of confidence intervals and came upon the formula for standard error... t x (stddev /...

• Replies: 8
• Views: 34,307
10-15-2008, 09:57 PM
18. ### calculating population variance from sampling distribution variance

Hi all, Let's say that I want to estimate the population mean and variance of a large bag of popcorn (unpopped). I have a scale, but it's not...

• Replies: 8
• Views: 24,071
05-23-2010, 02:45 PM
19. ### meta-analysis; negative pop'n variance

I have been trying to compute a meta-analysis (I actually did it before christmas but have since had to change one of the numbers). Since changing...

• Replies: 8
• Views: 2,647
02-11-2009, 08:53 AM
20. ### Ancova help

Hi, This is my first time posting here, so please forgive me if I'm not accurate enough. I've been doing an ancova in R. This is what I have...

• Replies: 8
• Views: 3,589
04-15-2009, 09:46 AM
21. ### Im not good at stat can someone help me?

Ok i need help with a question that i need help with out of a story problem i have this information expected value = 20,000 .90 probability...

• Replies: 8
• Views: 3,092
04-22-2009, 09:17 PM
22. ### repeated measures clarification

Hi- This is probably a basic question, but I'm really confused on the type of statistic to perform on the following analysis and I was wondering...

• Replies: 8
• Views: 2,552
06-15-2009, 08:07 AM
23. ### help on statistic at least one

does anyone know how to get this answer a sample of 4 different claculator is randomly selctedf from a group containing 14 that are defective and...

• Replies: 8
• Views: 3,260
06-18-2009, 12:15 PM
24. ### Calculating Probability from the Mean, and Standard Deviation

If anyone may be able to give me a little insight into how I would go about answering this question I would greatly appreciate it. This is the...

• Replies: 8
• Views: 114,657
11-08-2009, 04:30 PM
25. ### I need help with these 3 problems....i cant get the answers...been trying for hours

Please. somebody...i need help and i cant find anybody to help me. :( 1.) The summary statistics give below were taken from random samples that...

• Replies: 8
• Views: 3,011
12-13-2009, 11:20 PM

I would be so eternally greatful if somebody could please help me! I am doing my dissertation and have come to analysing my data using SPSS, and i am...

• Replies: 8
• Views: 2,846
02-09-2010, 06:04 PM
27. ### In Need of Article to Analyze

i have to find an article to analyze..it's a research paper project for statisctics of business course.. any article suggestion? thanks in advance

• Replies: 8
• Views: 6,054
05-13-2010, 02:57 PM
28. ### which test to use??

What can we observe from a simple boxplot?? I dont see the use of one, except for showing visually the data but aside form that it seems pretty...

• Replies: 8
• Views: 3,559
06-15-2010, 11:32 AM
29. ### nonparametric test percentages?

I have a data set that doesn't fulfil the assumptions of normal distribution and equal variances. SInce it's percentage values, the recommended...

• Replies: 8
• Views: 9,741
06-28-2010, 05:01 PM
30. ### HELP! - Statistical Significance Problem

The manufacturer of a daily dietary supplement claims that its product will help people lose weight. The company obtains a random sample of 950 adult...

• Replies: 8
• Views: 11,539
p05
07-16-2010, 12:32 PM
31. ### Where to from here - Basics - Help Needed

Hi guys, I have a research report I am writing currently. We have had to make two hypotheses; one about a relationship and another about a...

• Replies: 8
• Views: 3,112
08-15-2010, 08:17 AM
32. ### Mixed models: Calculating ICC for model with a random intercept and a random slope

Hello All, I have a question about how to calculate an intraclass correlation coefficient in a mixed model that has both a random intercept and a...

• Replies: 8
• Views: 8,312
08-14-2017, 06:26 PM
33. ### Ratio of Means - appropriate test for single or multiple comparisons? Fieller's CI?

I would really appreciate any suggestions with the following data analysis issue. Please read till the end as the problem at first may appear...

• Replies: 8
• Views: 2,498
10-07-2015, 12:25 PM
34. ### Absolute Loss Function

I am quite honestly at an "absolute loss" with this one... I know the answer can't be 2 yet I keep getting it.. any help is much appreciated. ...

• Replies: 8
• Views: 7,008
12-05-2016, 10:07 AM
35. ### Violating Linear Regression assumptions

I have a dataset in which I am performing linear regression with multiple covariates. The goal of the analysis is to identify important covariates...

• Replies: 8
• Views: 1,580
07-31-2015, 08:38 AM
36. ### New here and completely lost :/

Hello everyone! I’m a newbie here and to be honest in desperation googled “psychology statistics forum” thinking no way I’d find one and low and...

• Replies: 8
• Views: 1,597
09-11-2015, 04:55 PM
37. ### Assessing equivalency on pre-test

Hi, I am running an independent samples t-test on scores on a post-test continuous measure for two groups...there was no random assignment...

• Replies: 8
• Views: 1,124
11-05-2015, 11:37 PM
38. ### "You never see a Ferrari rust like a Honda"

When someone says "You never see a Ferrari rust like a Honda", the logical flaw is that a Honda is typically used as daily drivers thru severe...

• Replies: 8
• Views: 2,670
12-31-2015, 03:00 PM
39. ### Linear Regression Question

Hello Everyone. So I'm doing a stats assignment, and I'm having difficulty answering one of the questions. Here's the background question. A study...

• Replies: 8
• Views: 1,487
01-07-2016, 06:19 PM
40. ### Skewed Data

Good Morning, I am wondering if anyone can provide some advice regarding a problem with a large data set I have. I have a lot of outbreak...

• Replies: 8
• Views: 2,217
02-11-2016, 04:39 PM
41. ### Sample size vs population and sampling accuracy.

How do I calculate the accuracy of a sample of a population? I have a population of 30000 + records with a yes or no answer. If I only sample 20,...

• Replies: 8
• Views: 2,392
02-22-2016, 02:42 PM
42. ### Relationship between effect size, sample size and p-value?

Is there a simple formula that links effect size, sample size and p-value? Specifically, how does the p-value depend on effect size and sample...

• Replies: 8
• Views: 4,915
03-13-2016, 03:24 PM
43. ### N trials, 3 possible outcomes

I have n independent trials, where the result of each trial is either A, B or C, with probabilities a, b and c respectively, so that a + b + c = 1. ...

• Replies: 8
• Views: 1,360
03-09-2016, 12:37 PM
44. ### Relationship Between Increasing Mean and Standard Deviation

Greetings, we sampled some fungal populations from an agricultural field. Our sample size is 24, and we sampled six plots. We noticed the standard...

• Replies: 8
• Views: 2,209
04-08-2016, 02:05 PM
45. ### Confidence Intervals for Proportions -- Two ways to estimate population value?

Hi everyone, I'm wondering if anyone could help shed some light on why there appear to be two different ways that different textbooks show to...

• Replies: 8
• Views: 1,503
06-30-2016, 10:35 PM
46. ### Interpretation of 99% confidence interval

Hello guys, this is my first post here in the forum and if I missed anything, then pls correct me. My first statistic class starts this week...

• Replies: 8
• Views: 1,445
09-06-2016, 04:09 PM
47. ### Question about permutations ANOVA test

Hello everyone, I have data of a variable from 4 sites, with 3 repetitions from each site. Tests revealed that I do have homoscedasticity but no...

• Replies: 8
• Views: 1,254
09-02-2016, 05:31 AM
48. ### Cross validation question

Hi guys, I am a bit confused about what k-fold Cross Validtation does. Is it better to remove non significant variables and tune with k-fold cross...

• Replies: 8
• Views: 2,502
12-01-2016, 09:23 AM
49. ### What is Experimental Design

Hi all, it's been awhile since I've posted. Is there a concise description of what experimental design is in regards to statistics? I'm trying to...

• Replies: 8
• Views: 3,758
12-21-2016, 10:00 AM
50. ### Cluster analysis with conjoint analysis data

Hello everybody, My team and I have an assignment to run a conjoint analysis with SPSS. So far, we were able to make the orthogonal design to...

• Replies: 8
• Views: 1,161
04-16-2017, 04:40 AM
51. ### Why normality assumption needed?

I often see that for parametric tests one assumption is that the population should be normally distributed. However if I understand correctly the...

• Replies: 8
• Views: 1,818
04-06-2017, 02:13 PM
52. ### Bayes - need help informing priors

Hi! Anyone here familiar with Bayesian inference? I would like to inform priors for an analysis. I have Odds Ratios and 95% CIs. How would I...

• Replies: 8
• Views: 318
10-09-2017, 06:41 PM

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