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Forum: Statistics

Statistics course and homework discussion. Elementary statistics.

  1. Arrow Sticky Thread 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)...

    Started by quark‎, 09-30-2005 09:44 AM
    • Replies: 0
    • Views: 66,620
    09-30-2005, 09:44 AM Go to last post
  2. Sticky Thread 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...

    Started by TheEcologist‎, 11-27-2010 12:13 PM
    • Replies: 1
    • Views: 196,561
    07-16-2014, 11:01 AM Go to last post
  1. Question Nominal, Ordinal, Ratio, Interval...? Need help.

    I am having a really hard time with deciding whether things are nominal, ordinal, ratio, or interval. I was given four problems and asked to list...

    Started by jfoust01‎, 01-30-2006 01:42 PM
    • Replies: 2
    • Views: 16,952
    01-30-2006, 07:11 PM Go to last post
  2. Question principal component analysis and scoring

    I have a set of data and want to determine which cases group in terms of the component factors determined through principal component analysis. I'm...

    Started by greenlizz‎, 01-31-2006 12:19 AM
    • Replies: 1
    • Views: 3,218
    01-31-2006, 07:46 AM Go to last post
  3. Variability

    Hi, I have a question for my home work about finding the 3 measure sof vairability for the variable that is given to us.but i am little confuse...

    Started by Amjad‎, 01-31-2006 03:56 PM
    • Replies: 2
    • Views: 3,895
    02-01-2006, 10:49 AM Go to last post
  4. Median, Conceptual

    So the problem goes: The 14 people in group A have median age 28.4 years. The 20 people in group B have median age 36.2 years. What can you say...

    Started by panz‎, 02-01-2006 11:59 AM
    • Replies: 1
    • Views: 2,834
    02-01-2006, 12:23 PM Go to last post
  5. estimating parameters.

    Hello there, I am having trouble with the following question. "An experiment in which 64 indivduals had their pulse rates recorded (x) and ,...

    Started by beast‎, 02-04-2006 11:27 AM
    • Replies: 1
    • Views: 2,842
    02-04-2006, 08:53 PM Go to last post
  6. Analysing an interstellar colony

    Hi, This is really easy stuff for all the stats wizards here, but I'd really appreciate some help please. :yup: Suppose there's a colony of...

    Started by scifiguru‎, 02-05-2006 05:13 AM
    • Replies: 6
    • Views: 3,188
    02-07-2006, 07:59 AM Go to last post
  7. Question related or independent observations - help needed

    Hi, I am working in a project using data gathered for business purposes and I have a problem related to the observations in my samples. A...

    Started by Ema‎, 02-07-2006 04:35 AM
    • Replies: 1
    • Views: 3,663
    02-07-2006, 08:32 AM Go to last post
  8. T statistic

    I was recently asked to calculate a T statistic for a correlation test and I'm not sure what the test identifies and how to read the results. I used...

    Started by Completely Confused‎, 02-07-2006 03:07 PM
    • Replies: 1
    • Views: 4,791
    02-07-2006, 03:22 PM Go to last post
  9. Help

    I have to do a presentation for stats class tonight and don't understand how to explain my quantile plots, confidence intervals, correlation of...

    Started by phippsc‎, 02-07-2006 05:22 PM
    • Replies: 1
    • Views: 2,159
    02-07-2006, 08:14 PM Go to last post
  10. T Statistic

    I have been asked to complete a t test to determine if my coefficient and related variables are reliable enough. The variables are related to...

    Started by Completely Confused‎, 02-08-2006 11:21 AM
    • Replies: 7
    • Views: 3,614
    02-08-2006, 03:06 PM Go to last post
  11. Logistic regression--Odds Ratios

    Sometimes I have trouble with interpreting ORs. When it is less than 1, how do you interprete it. For example, if the OR is 0.45 between...

    Started by Susanbwh‎, 02-08-2006 03:37 PM
    • Replies: 2
    • Views: 3,043
    02-09-2006, 08:52 AM Go to last post
  12. Anova

    Can I use ANOVA when the variables were in a way correlated? I think we assume that the variables are independent in ANOVA. Am I right?

    Started by Susanbwh‎, 02-09-2006 08:55 AM
    • Replies: 1
    • Views: 2,299
    02-09-2006, 09:05 AM Go to last post
  13. Fischer's

    Is Fischer's exact.. a good way when we have small sample size, like around 50?

    Started by Susanbwh‎, 02-09-2006 08:56 AM
    • Replies: 1
    • Views: 2,738
    02-09-2006, 09:06 AM Go to last post
  14. Factor analysis

    Is anyone an expert on factor analysis?

    Started by Susanbwh‎, 02-08-2006 01:58 PM
    • Replies: 13
    • Views: 4,371
    02-10-2006, 09:17 AM Go to last post
  15. Observed and expected

    It may be a very silly question, but I have trouble conceptualizing these two terms. I had this contingency table with 2 rows and colums. Is...

    Started by Susanbwh‎, 02-11-2006 12:53 PM
    • Replies: 3
    • Views: 10,094
    02-12-2006, 05:24 PM Go to last post
  16. Unhappy Numerical Measures

    I am having major Statistics burnout. I hope someone can please help me with this. I know the range is the largest value minus the smallest value,...

    Started by goldie‎, 02-12-2006 07:21 PM
    • Replies: 1
    • Views: 4,738
    02-12-2006, 08:26 PM Go to last post
  17. Simple linear regression - Do I include the constant in the equation?

    Hello, I am hoping someone can help me with a few regression questions. I am running a number of simple linear regressions....Do I want to (should...

    Started by grensot‎, 02-12-2006 01:16 PM
    • Replies: 4
    • Views: 7,398
    02-13-2006, 12:11 AM Go to last post
  18. Difference between RMS & Standard Deviation

    Hi there, I am trying to figure out the difference between RMS and Standard Deviation. Are they two ways of saying the same thing? I understand...

    Started by tja26‎, 02-13-2006 05:24 AM
    • Replies: 2
    • Views: 68,374
    02-13-2006, 09:56 AM Go to last post
  19. Question level of meausrement

    Hi , I am woundering if you can tell me if I am corect in understanding the levelof mesuremnet? The following data's level of measurement is...

    Started by Amjad‎, 02-13-2006 01:57 PM
    • Replies: 2
    • Views: 3,063
    02-13-2006, 03:53 PM Go to last post
  20. REGRESSION QUESTION - need residuals

    I have done a series of regressions, all of which have slopes very close to O. I want to perform a Mann-Whitney U tet for independent samples between...

    Started by grensot‎, 02-13-2006 10:59 PM
    • Replies: 1
    • Views: 2,849
    02-13-2006, 11:21 PM Go to last post
  21. Interaction

    I need help clarify something. I had about 300 youths to investigate the association between perceptions and treatment adherence. I categorized age...

    Started by Susanbwh‎, 02-15-2006 11:48 AM
    • Replies: 5
    • Views: 4,109
    02-16-2006, 09:26 AM Go to last post
  22. skewness issue

    I'm trying to find the skewness for this distribution using SPSS: Bin..........Freq 0-10........78 10-20......2589 20-30......922...

    Started by cmb‎, 02-11-2006 11:47 PM
    • Replies: 9
    • Views: 3,559
    02-16-2006, 04:30 PM Go to last post
  23. Mls

    Newbie here! Lost in statistics.....:confused: I really need someone to explain how to find a Confidence Interval for a correlation coefficient. ...

    Started by MLS‎, 02-16-2006 11:52 AM
    • Replies: 3
    • Views: 2,310
    02-17-2006, 10:33 AM Go to last post
  24. using Anova for 3 raw data analysis

    I want to know the way to using anova for raw data analysis. Suppose have 3 batches of data, and want to know whether the data should be process per...

    Started by mchoud‎, 02-18-2006 11:32 AM
    • Replies: 2
    • Views: 3,896
    02-18-2006, 12:25 PM Go to last post
  25. Cool Central Limit Theorem

    I am having trouble coming up with the right answer for the following problem: Elevator Design: Womens heights are normally distributed with a...

    Started by KC1‎, 02-18-2006 12:15 PM
    • Replies: 1
    • Views: 5,544
    02-18-2006, 02:38 PM Go to last post
  26. Exclamation Need Help, Sampling Distribution of Pins

    Hey I have been toiling over this homework for a while now. I think I may have it correct but I am not certain. Here is the background info for the...

    Started by schizo69000‎, 02-16-2006 10:51 PM
    • Replies: 2
    • Views: 4,623
    02-18-2006, 05:20 PM Go to last post
  27. Comparing distributions, Two-Sample KS-test and Bonferroni

    Hi there, The following is my problem for which Im grateful to have any advice/opinions: I measured the distances animals moved in 3 different...

    Started by Soldanella‎, 02-19-2006 04:51 PM
    • Replies: 1
    • Views: 10,796
    02-19-2006, 05:14 PM Go to last post
  28. Likert data question

    In working with Likert data on a survey when you encounter a double entry on one question how do you handle that response? my hunch is to throw...

    Started by jerryb‎, 02-20-2006 11:18 AM
    • Replies: 4
    • Views: 2,861
    02-20-2006, 01:02 PM Go to last post
  29. random effects model (ANOVA)

    hello there, I am struggling with the following question: "show that the error SS, for the random effects model, is the same...

    Started by beast‎, 02-21-2006 06:35 AM
    • Replies: 0
    • Views: 3,347
    02-21-2006, 06:35 AM Go to last post
  30. Wink Stats help

    Hi all, I am a new user of this forum and seek some advice on some data handling. I am carrying out a two-way repeated measures ANOVA, on SPSS,...

    Started by StuGray‎, 02-21-2006 04:57 AM
    • Replies: 1
    • Views: 2,283
    02-21-2006, 09:22 AM Go to last post
  31. Question Linear Regression??

    So I'm a little clueless with this I feel like I don't have enough information but maybe I'm missing something. Here is the question: Assume that...

    Started by kier0677‎, 02-22-2006 08:20 PM
    • Replies: 4
    • Views: 3,084
    02-22-2006, 08:58 PM Go to last post
  32. Central Limit Theroy

    I have a problem i cant seem to figure out. X is from a population with u=53 and s=24. A sample size of 59 is taken from the population and an...

    Started by StatsMike‎, 02-22-2006 03:08 PM
    • Replies: 2
    • Views: 2,243
    02-23-2006, 05:07 AM Go to last post
  33. Nonparametric post hocs

    Hi all, I am analyzing behavioral data from experiments I have conducted. I have used the Kruskal-Wallis nonparametric ANOVA to identify if...

    Started by umtox‎, 02-22-2006 01:16 PM
    • Replies: 2
    • Views: 7,364
    02-23-2006, 08:08 AM Go to last post
  34. Student Needing Help

    I am lost with this question. Could someone please help? A normal population has a mean of 20.0 and a standard deviation of 4.0. Compute the...

    Started by seabass069‎, 02-19-2006 11:24 PM
    • Replies: 4
    • Views: 3,005
    02-23-2006, 01:29 PM Go to last post
  35. level of measurement

    Hi John, just to confirm if the following is the ratio measurement. I belive its ratio because the zero is the actual possibility, when there is no...

    Started by Amjad‎, 02-23-2006 11:15 AM
    • Replies: 4
    • Views: 7,819
    02-23-2006, 01:53 PM Go to last post
  36. Exclamation Help needed for biology coursework

    Just wondering if anyone can help? I need to know what Stats test to use.... I was investigating the effect on maggots after being exposed to...

    Started by hkryatt‎, 02-21-2006 07:15 AM
    • Replies: 3
    • Views: 3,108
    02-24-2006, 08:12 AM Go to last post
  37. question on 2 tailed Z test

    If you performed a 2 tailed z test with alpha= 0.05, the null hypothesis will be rejected if the computed value of the z stats is higher than ______...

    Started by ajk003‎, 02-24-2006 02:37 PM
    • Replies: 1
    • Views: 4,914
    02-24-2006, 02:40 PM Go to last post
  38. question on research problem

    I'm having some trouble with conducting a hypothesis test: Suppose it has been esablished that musicians, as a general population, have a mean IQ...

    Started by ajk003‎, 02-24-2006 03:00 PM
    • Replies: 1
    • Views: 2,251
    02-24-2006, 03:20 PM Go to last post
  39. Pre/Post Data

    Hello. I have pre/post data that I would like advice on what would be the most appropriate data analysis method. I visited a group of clinics and...

    Started by kique‎, 02-24-2006 04:35 PM
    • Replies: 1
    • Views: 7,934
    02-24-2006, 05:33 PM Go to last post
  40. Hypothesis testing with no stated standard deviation

    My head is going to explode, can someone help before it is too late? Te problem: According to the government, 23% of all American adults have...

    Started by not a math genius‎, 02-25-2006 12:02 AM
    • Replies: 1
    • Views: 44,540
    02-25-2006, 08:35 AM Go to last post
  41. Contributions over the span of four years.

    This one is irritating me: From the years 2001 to 2004, the following data is compiled for political contributions in a particular party: ...

    Started by not a math genius‎, 02-25-2006 12:13 AM
    • Replies: 1
    • Views: 3,303
    02-25-2006, 09:00 AM Go to last post
  42. Computing Z scores

    I am doing homework and i can't seem to figure out the correct answer. Question: Men vs. Women The average 20 - 29 year old man is...

    Started by sophieb‎, 02-26-2006 06:00 PM
    • Replies: 1
    • Views: 15,521
    02-26-2006, 06:07 PM Go to last post
  43. Computing Z-Scores #2

    The following data represent the number of inches of rain in Chicago, Illinois, during the month of April for 20 randomly selected years. 2.47,...

    Started by sophieb‎, 02-26-2006 06:18 PM
    • Replies: 2
    • Views: 7,436
    02-26-2006, 08:30 PM Go to last post
  44. Talking formulas

    Good evening, Ladies and Gents., I am looking for formulas fro the mean, median, quartiles all the above. I have a test this week and my text book...

    Started by student‎, 09-30-2005 12:35 AM
    • Replies: 3
    • Views: 3,024
    02-27-2006, 11:28 AM Go to last post
  45. Post stuck need help

    THIS IS THE QUESTION PiggyBank wants to ESTIMATE the MEAN DOLLARS that each card holder will spend EACH MONTH. It would like to be within PLUS OR...

    Started by mcafeep‎, 02-27-2006 04:43 PM
    • Replies: 1
    • Views: 3,052
    02-27-2006, 09:05 PM Go to last post
  46. categorical age or year-age?

    Hi John: I decided to use 3-level categorical age: children, younger adolescents, older adolescents. I also included year-age in the stratified...

    Started by Susanbwh‎, 03-01-2006 10:56 AM
    • Replies: 3
    • Views: 3,361
    03-01-2006, 12:30 PM Go to last post
  47. Post Help

    Need help Im lost on this one, it was suppose to be a group project but I cannot get them to respond. I have uploaded a file to go into more detail...

    Started by mcafeep‎, 03-02-2006 11:00 AM
    • Replies: 0
    • Views: 1,917
    03-02-2006, 11:00 AM Go to last post
  48. 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...

    Started by iporter‎, 02-10-2006 02:39 PM
    2 Pages
    1 2
    • Replies: 22
    • Views: 8,210
    03-03-2006, 12:28 PM Go to last post
  49. Question on decision rule

    I'm a little confused on how to make a decision rule given an alpha value. For example if the problem was a two ailed z test with a alpha of .03,...

    Started by ajk003‎, 03-02-2006 10:53 PM
    • Replies: 3
    • Views: 12,811
    03-03-2006, 02:17 PM Go to last post
  50. 95% confidence interval

    I'm not sure how to construct a 95% confidence interval for a one tailed test. I know that for a two tailed test, it's just the critical value...

    Started by ajk003‎, 03-03-2006 03:07 PM
    • Replies: 1
    • Views: 3,002
    03-03-2006, 03:13 PM Go to last post
  51. Confidence Intervals, Sample Size

    The mean weight of trucks traveling on a particular si not known. A highway inspector needs an estimate of the mean. a random sample of 49 trucks...

    Started by posnake‎, 03-03-2006 10:57 PM
    • Replies: 1
    • Views: 2,510
    03-03-2006, 11:05 PM Go to last post
  52. Normal Distribution question...

    This is from a college problem sheet. I'm having quite a bit of difficulty with it. So any help would be greatly appreciated. Let the random...

    Started by Mutant_Fruit‎, 03-04-2006 12:04 PM
    • Replies: 1
    • Views: 1,920
    03-04-2006, 01:03 PM Go to last post
  53. 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...

    Started by craigtomk‎, 02-19-2006 05:49 AM
    • Replies: 8
    • Views: 3,527
    03-04-2006, 10:38 PM Go to last post
  54. Eigenvalues

    Hi Would you mind explaining the concept of the eiganvalue to me? Thank you Diane

    Started by Diane‎, 03-04-2006 02:41 PM
    • Replies: 1
    • Views: 13,275
    03-04-2006, 10:43 PM Go to last post
  55. p-value and relation to error

    How does p-value relate to error?

    Started by LTR1023‎, 03-05-2006 12:34 PM
    • Replies: 1
    • Views: 1,953
    03-05-2006, 01:26 PM Go to last post
  56. STUCK and dont know what to do HELP

    The assignement outlined: First interpretation of bank statement: The bank does not know whether the mean dollars spent per card holder per month...

    Started by mcafeep‎, 03-05-2006 12:17 PM
    • Replies: 1
    • Views: 2,690
    03-05-2006, 01:29 PM Go to last post
  57. Question I Need Help?????

    السلام عليكم HOM I USED BOX-MUKKER TRANSMITATION FOR GENRATION SAMPLS FROM UNFORM DISTRUBIOTIN NORMAL, DOUBLE EXPONATIANL, EXPONATIANL AND I NEED...

    Started by kdojh‎, 03-05-2006 11:06 AM
    • Replies: 1
    • Views: 1,998
    03-05-2006, 01:30 PM Go to last post
  58. three-way anova help please!

    hi! i'm currently performing a practical in R requiring 3-way fixed effects ANOVA for my maths degree. There are 2 quantitative factors -...

    Started by alucks‎, 03-05-2006 02:17 PM
    • Replies: 4
    • Views: 3,202
    03-05-2006, 04:21 PM Go to last post
  59. Explaining this example... (minimising variance)

    Hi, i'm just wondering if someone could give me an explanation as to whats going on in this example. I don't understand why the values for E(X) and...

    Started by Mutant_Fruit‎, 03-05-2006 05:41 PM
    • Replies: 0
    • Views: 2,565
    03-05-2006, 05:41 PM Go to last post
  60. Roc

    Hi! One real quick and basic question. I need to evaluate the performance of a speaker verification system and I have read that receiver operating...

    Started by Erida‎, 02-23-2006 11:13 AM
    • Replies: 2
    • Views: 3,086
    03-05-2006, 07:49 PM Go to last post

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