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Forum: Statistics

Statistics course and homework discussion. Elementary statistics.

  1. 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: 196,951
    07-16-2014, 11:01 AM Go to last post
  2. 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: 66,855
    09-30-2005, 09:44 AM Go to last post
  1. Nominal/Ordinal scale variables and analysis

    Hi, I’m a student in need of some help. I have developed a questionnaire with Likert type scales to measure the attitudes of employees in relation to...

    Started by Roger‎, 04-30-2006 01:02 PM
    • Replies: 1
    • Views: 6,329
    04-30-2006, 01:40 PM Go to last post
  2. Question Normality and ANOVA test

    Hie, found this forum by chance and thought this forum is a good idea to help people with their analysis. Currently i am stuck in my data analysis...

    Started by Nee‎, 04-26-2006 11:33 AM
    • Replies: 6
    • Views: 3,655
    04-29-2006, 10:01 AM Go to last post
  3. Does it make sense to calculate a standard deviation from only three values?

    I have sets of three values. Does the standard deviation make sense from only three values? Is there a minimum number of values that is recommended...

    Started by tja26‎, 04-27-2006 03:45 AM
    • Replies: 5
    • Views: 8,835
    04-28-2006, 07:36 AM Go to last post
  4. Confidence Int for shifted exp dist

    herez the q: Let random variable X has shifted exponential distribution with density function given as follows: F(x, t) = { L exp (-L (x - @))...

    Started by lunlo‎, 04-27-2006 08:13 PM
    • Replies: 0
    • Views: 1,967
    04-27-2006, 08:13 PM Go to last post
  5. What exactly is the p-value and the significance level?

    Hi, I'm at the end of my first semester in statistics and we just finished confidence intervals and I'm completely overwhelmed. I have a take-home...

    Started by garfunkel41‎, 04-27-2006 02:09 PM
    • Replies: 1
    • Views: 5,248
    04-27-2006, 03:14 PM Go to last post
  6. looking for someone to Critique HW

    Can anyone look over my Home Work? Members of the watewishers club and their weights are: Al 243 bess 255 carl 255 delia 312 ebb 227 flo...

    Started by GeorgeBurns‎, 04-26-2006 09:01 AM
    • Replies: 2
    • Views: 1,957
    04-27-2006, 12:57 PM Go to last post
  7. Evaluating RMSE for MLR models

    On what basis does one evaluate the RMSE? When is it considered to be "too high?" It has been my understanding that in order to assess the...

    Started by Grateful‎, 04-27-2006 11:40 AM
    • Replies: 1
    • Views: 4,350
    04-27-2006, 11:49 AM Go to last post
  8. r squared and t stats

    I am running regression analysis of panel data examining whether there exists a relationship between aid and investment as well as between aid and...

    Started by Alex E‎, 04-27-2006 05:28 AM
    • Replies: 2
    • Views: 3,893
    04-27-2006, 11:42 AM Go to last post
  9. standard normal distribution help

    how do you do greater then problems doing this? we are using a chart.. chart is here.....

    Started by liljjp‎, 04-26-2006 11:05 PM
    • Replies: 1
    • Views: 4,110
    04-27-2006, 08:10 AM Go to last post
  10. Help needed for Analysis on this complex project

    Hello Friends, I have been working on this huge experiment (without a statistical background). It involved 28 participants divided into 4 Groups....

    Started by Ninad‎, 04-26-2006 02:08 PM
    • Replies: 5
    • Views: 2,090
    04-26-2006, 08:22 PM Go to last post
  11. Question FACTOR ANALYSIS - POOLING data from different samples

    I'm conducting an exploratory factor analysis to examine the factor structure of a translation of an established scale. There are 20 variables. I...

    Started by Binka‎, 04-26-2006 06:14 AM
    • Replies: 0
    • Views: 2,874
    04-26-2006, 06:14 AM Go to last post
  12. Smile Confidence Interval Help

    A usrvey of 49 randomly selected banks in New York revealed that these banks required average down payments of 35% of the purchase price of the home...

    Started by GeorgeBurns‎, 04-25-2006 07:54 AM
    • Replies: 2
    • Views: 2,630
    04-25-2006, 08:52 AM Go to last post
  13. Unspoken ANOVA assumption

    I heard that ANOVA does not like cells with small number of cases and that a small number could throw off results--and that the number is unspeicifed...

    Started by kalbright36‎, 04-22-2006 11:16 PM
    • Replies: 3
    • Views: 2,230
    04-25-2006, 07:52 AM Go to last post
  14. Exclamation Statistical analysis for likert type scale

    Hey, please help! I am currently analysing data from a likert scale, descriptive stats not a problem, it is the inferential stats im having a problem...

    Started by mariapsychnightmare‎, 04-23-2006 07:03 PM
    • Replies: 6
    • Views: 16,166
    04-24-2006, 08:27 PM Go to last post
  15. Arrow Urgent!

    I found this post by Orangeb and its exactly the same quiz Im working on. Could anyone help Orangeb and I on this one? We both would be greatful and...

    Started by GeorgeBurns‎, 04-24-2006 05:46 PM
    • Replies: 1
    • Views: 1,756
    04-24-2006, 06:19 PM Go to last post
  16. Cool How do I do this>?

    How do I attempt or solve a question like this? Can someone solve it and expalin it to me as a roadmap to other problems that plague me? here it...

    Started by GeorgeBurns‎, 04-23-2006 04:01 PM
    • Replies: 4
    • Views: 2,285
    04-24-2006, 10:12 AM Go to last post
  17. Smile Stats help

    Insurance industry analysts report that the average amount of life insurance in effect in Virginia is $92,500 with a sample standard deviation of...

    Started by GeorgeBurns‎, 04-23-2006 01:49 PM
    • Replies: 1
    • Views: 1,591
    04-23-2006, 07:43 PM Go to last post
  18. Smile Grouping by the dependent variable

    Why should one NOT group by the dependent variable in a regression context?

    Started by callen‎, 04-23-2006 02:54 PM
    • Replies: 1
    • Views: 2,512
    04-23-2006, 07:31 PM Go to last post
  19. Control Variate for normal r.v.

    Hello! I would like to know what is the best/natural choice for the control variate of a normal (gaussian) random variable. Thank you.

    Started by Bernardokp‎, 04-20-2006 09:15 PM
    • Replies: 2
    • Views: 1,900
    04-23-2006, 05:15 PM Go to last post
  20. Smile least-squares prediction

    A sociologist beleives that there is a tendency for tall men to marry tall women. To determine the nature of such a relationship, the heights of the...

    Started by GeorgeBurns‎, 04-23-2006 01:41 PM
    • Replies: 0
    • Views: 2,708
    04-23-2006, 01:41 PM Go to last post
  21. Smile null and alternate hypotheses

    His agent claims that the average speed of a fastball thrown by pitcher Moe M. Down is 90 mph. If the average speed of 64 randomly selected...

    Started by GeorgeBurns‎, 04-23-2006 12:01 PM
    • Replies: 1
    • Views: 2,191
    04-23-2006, 01:18 PM Go to last post
  22. Confirmatory factor analysis

    Hi, does anyone here knows a good website that explains how to perform a confirmatory factor analysis with AMOS? Thank you, Hans

    Started by holiday‎, 04-23-2006 03:18 AM
    • Replies: 0
    • Views: 2,498
    04-23-2006, 03:18 AM Go to last post
  23. Talking Help

    I need help with answering this question: The average hourly pay of medical typists in a large city if $15.00 with a standard deviation of $2.80....

    Started by GeorgeBurns‎, 04-20-2006 10:10 PM
    • Replies: 1
    • Views: 1,782
    04-22-2006, 11:09 PM Go to last post
  24. Sample size and Power

    Hi I am interested in finding out the how to determine what sample size I need for a survey and how that is related to effect and power. Also,...

    Started by Diane‎, 04-17-2006 11:56 AM
    • Replies: 3
    • Views: 2,988
    04-21-2006, 02:33 PM Go to last post
  25. chi square with 0 votes in cells

    Hi! I want to analyze votes for any significant preferencies. My tables look like this: A - 12 B - 8 C- 0 D - 10 Now, the expected frequency is...

    Started by Janka‎, 04-20-2006 11:28 AM
    • Replies: 2
    • Views: 2,824
    04-21-2006, 08:09 AM Go to last post
  26. Unhappy What test to use?

    I have a continuous dependent variable and an ordinal variable. I've found tests for 2 ordinal (Kendall's, Gamma), but what do I do in this case?...

    Started by kalbright36‎, 04-20-2006 02:13 AM
    • Replies: 1
    • Views: 2,200
    04-20-2006, 07:35 AM Go to last post
  27. Question least regression

    I am a student taking basic stats and I am not sure if I arrived at the correct answer for these could someone please let me know. Consider the...

    Started by momof4‎, 04-19-2006 05:31 PM
    • Replies: 0
    • Views: 1,667
    04-19-2006, 05:31 PM Go to last post
  28. How to convert a table of probabilities to j.p.d.f

    Among the sudent that attempted the exams of Calculus III (CIII) and Differential Equation (DE) is oberved that the joint probability of passing or...

    Started by -illuzion-b18c1‎, 04-19-2006 05:08 PM
    • Replies: 0
    • Views: 2,326
    04-19-2006, 05:08 PM Go to last post
  29. Need help with hypothesis testing problems

    Microsoft believes that if over 30% of Linux users would be interested in a particular new software package, then the company will make at least an...

    Started by securitygeek‎, 04-19-2006 02:36 PM
    • Replies: 0
    • Views: 2,126
    04-19-2006, 02:36 PM Go to last post
  30. Angry Any suggestions??

    I am working on a project to construct and report results of a regression model, but I am stuck on trying to find an idea to construct. I originally...

    Started by Twinkie‎, 04-18-2006 02:24 AM
    • Replies: 3
    • Views: 2,441
    04-19-2006, 09:59 AM Go to last post
  31. confounded by confounders

    I chose numbers of new patients and numbers of pediatric patients as confounders for a survey of practices used in dialysis facilities. Now that I'm...

    Started by kalbright36‎, 04-14-2006 01:17 AM
    • Replies: 5
    • Views: 2,849
    04-18-2006, 07:51 AM Go to last post
  32. Exclamation Construct validity check problems

    Hi, First time user here. Thanks for puttting up this forum! :tup: Background: I am writing about factors that affect the adoption of IT. ...

    Started by holiday‎, 04-14-2006 12:24 AM
    • Replies: 5
    • Views: 3,642
    04-17-2006, 08:18 PM Go to last post
  33. Arrow level of significance test with no standard deviation

    Hi, one question...been doing one and two tailed tests of level of significance but have a problem without a standard deviation...How do I proceed...

    Started by tysull‎, 04-14-2006 01:51 PM
    • Replies: 1
    • Views: 7,302
    04-14-2006, 02:10 PM Go to last post
  34. Likert analysis & survey - help!

    Hi, Pls help. Textbooks on this topic is making me nuts :( I have a 20 qn survey looking at people perceptions on 'perceived unfairness' about an...

    Started by Nina‎, 04-13-2006 09:36 AM
    • Replies: 6
    • Views: 3,341
    04-14-2006, 11:41 AM Go to last post
  35. non parametric stepwise regression

    Anyone know of a nonparametric version for stepwise regression?

    Started by renduff‎, 04-13-2006 06:24 PM
    • Replies: 1
    • Views: 2,911
    04-13-2006, 07:30 PM Go to last post
  36. Are weighted means appropriate?

    Hi- I am looking for information about weighted means. Are they appropriate to use when sample sizes are unequal? I am measuring plant roots- some...

    Started by Claire‎, 04-10-2006 03:01 PM
    • Replies: 4
    • Views: 2,786
    04-12-2006, 08:42 AM Go to last post
  37. Lightbulb confused again...

    dear friends here i am again. My new query is this: i have one group of patients to be treated in a new position with ESWL: 19 obese patients with...

    Started by tdk‎, 04-01-2006 03:03 PM
    • Replies: 3
    • Views: 1,914
    04-12-2006, 12:57 AM Go to last post
  38. please help

    ok stats question.... in a recent survey of 500 high school students, 334 said that if they found $1,000 behind a bush at school they would keep the...

    Started by stewartm1‎, 04-11-2006 11:55 AM
    • Replies: 1
    • Views: 1,926
    04-11-2006, 12:08 PM Go to last post
  39. Red face survey and "other" responses

    If a survey question offered 2 choices plus "other," when converting to variables, would this be dichotomous or nominal? (The data is not continuous,...

    Started by kalbright36‎, 04-10-2006 05:25 PM
    • Replies: 1
    • Views: 2,225
    04-11-2006, 07:57 AM Go to last post
  40. Exclamation Mean and Standard Deviation-due tomorrow

    The amount of time a Lakemore Statistics student spends on homework each evening is approximately normally distributed. If 22% of the 75 students...

    Started by FAIRMADIEN787‎, 04-10-2006 05:28 PM
    • Replies: 1
    • Views: 2,724
    04-10-2006, 11:10 PM Go to last post
  41. Hypergeometric distribution question

    I have a homework question on capture/recapture without replacement. I'm really struggling answering the question and hope someone can help. ...

    Started by maggie2‎, 04-08-2006 09:13 PM
    • Replies: 4
    • Views: 4,022
    04-10-2006, 10:15 AM Go to last post
  42. normal distribution questions--am I on the right path

    hi...just checking to see if I am on the right track on these problems. here is what I have: in a normal distribution with u =200 and r=30, find...

    Started by tysull‎, 04-06-2006 08:19 PM
    • Replies: 1
    • Views: 2,384
    04-10-2006, 10:01 AM Go to last post
  43. Using a TI-84

    Can you show me how to graph a histogram in the calculator:p And how to program the equations that are needed into the calculator for use on the...

    Started by grays‎, 04-04-2006 03:40 PM
    • Replies: 3
    • Views: 4,924
    04-10-2006, 09:53 AM Go to last post
  44. Red face Can percent be a "continuous" variable?

    I got percentages of lab tests meeting a desirable target range. I want to use the percentages as scores (higher the better) and compare them to...

    Started by kalbright36‎, 04-10-2006 01:52 AM
    • Replies: 1
    • Views: 4,554
    04-10-2006, 07:28 AM Go to last post
  45. simple correlation question

    Dear all, I have a very simple and may be silly question about correlation. When we want to correlate two sets of scores is it necessary that the...

    Started by Humphrey‎, 04-09-2006 05:31 AM
    • Replies: 1
    • Views: 2,158
    04-09-2006, 02:25 PM Go to last post
  46. Thumbs up Can you check my homework it is due 4/5/06 at 10 a.m. Eastern

    :yup: Holiday Spending. "How much do you plan to spend for gifts this holiday season?" An interviewer asks this question of 250 customers at a...

    Started by grays‎, 04-04-2006 02:59 PM
    • Replies: 2
    • Views: 5,075
    04-07-2006, 10:47 AM Go to last post
  47. Meaning of p

    Hi everyone need a bit of help. From my knowledge the p value is the chance that the null hypothesis is true so if p=0.05 then there is only a 5%...

    Started by borgmeister‎, 04-06-2006 03:40 PM
    • Replies: 1
    • Views: 3,219
    04-06-2006, 07:33 PM Go to last post
  48. Exclamation Post Hoc tests - significant interaction

    I'm involved in a student project that is investigating the effects of anticipation on the magnitude of the reflex muscle activity in the arm. I have...

    Started by CraigMc‎, 04-06-2006 03:11 PM
    • Replies: 0
    • Views: 2,347
    04-06-2006, 03:11 PM Go to last post
  49. Angry Need Help Urgently

    Hey guys I need help in an assignment it is due tonight, and i am clueless about what to do the assignment is here...

    Started by nokidding‎, 04-06-2006 01:39 PM
    • Replies: 0
    • Views: 2,143
    04-06-2006, 01:39 PM Go to last post
  50. Newbie Here! Question on find number of test...

    This is a three part question where we are given a set of data samples. coupon tip1 tip2 1 47 ...

    Started by redevo7‎, 04-05-2006 08:57 PM
    • Replies: 1
    • Views: 4,257
    04-05-2006, 10:43 PM Go to last post
  51. datasets finding

    Hi, my first time on this forum, I will soon do a project on ANOVA and we need to design ANOVA models with 3 factors or more, can anyone provide me...

    Started by hippophip‎, 04-02-2006 09:17 PM
    • Replies: 2
    • Views: 2,200
    04-05-2006, 07:09 PM Go to last post
  52. Question Hypothesis testing for populations?

    I was hoping someone could help me out with the following issue. I am accustomed to performing t-tests on two samples to determine if there is a...

    Started by Christopher‎, 04-05-2006 09:34 AM
    • Replies: 2
    • Views: 2,232
    04-05-2006, 02:06 PM Go to last post
  53. Example Questions for a Final

    Do you have any example questions for a comprehensive final? If, so please e-mail them my final is on May 8, 06. Thanks in advance Shonna

    Started by grays‎, 04-04-2006 03:45 PM
    • Replies: 0
    • Views: 1,987
    04-04-2006, 03:45 PM Go to last post
  54. Please check homework problem #2

    :confused: Coaching and the SAT. Suppose that SAT mathematics scores in the absence of coaching vary Normally with mean mule=475 and standard...

    Started by grays‎, 04-04-2006 03:25 PM
    • Replies: 0
    • Views: 4,152
    04-04-2006, 03:25 PM Go to last post
  55. Question Can't seem to figure this out... any help?

    "A shopping center developer claims in a presentation to a potential client that at least 40% of the adult female population in a community visit the...

    Started by wbh1‎, 04-04-2006 01:51 PM
    • Replies: 0
    • Views: 2,113
    04-04-2006, 01:51 PM Go to last post
  56. Normal Distributions

    ok, I have this one problem that I cannot figure out for the life of me. It's probably really simple, but I really just can't figure it out. Any...

    Started by AcidicBassist‎, 04-03-2006 11:35 PM
    • Replies: 0
    • Views: 2,849
    04-03-2006, 11:35 PM Go to last post
  57. P-value method

    I have a couple of questions I would like to know if I am doing them correctly or not, any guidence would be greatly appreciated. Test the given...

    Started by hannao1‎, 04-02-2006 10:25 PM
    • Replies: 0
    • Views: 5,943
    04-02-2006, 10:25 PM Go to last post
  58. Significance level in r (correlation coefficient)

    Hi John: I am going Pearson correlation analyses, first in overall sample, and then I divided them into three strata or groups. r is significant...

    Started by Susanbwh‎, 04-01-2006 10:08 AM
    • Replies: 1
    • Views: 5,307
    04-02-2006, 11:20 AM Go to last post
  59. Another Hypothesis Question

    OK...pls give me an idea where to start this one...I want to learn the steps, not be given the answer...I'm not looking for charity, just lost in...

    Started by khoops111‎, 03-14-2006 11:51 PM
    • Replies: 2
    • Views: 2,062
    04-02-2006, 10:43 AM Go to last post
  60. Question Q about % contribution

    hi, I want to ask: why do we use 'Sum of Squares' in compting percent contribution and not 'effect estimate'??? :confused: thanks for help!!...

    Started by engstudents‎, 04-01-2006 10:40 PM
    • Replies: 1
    • Views: 1,909
    04-02-2006, 10:09 AM Go to last post

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