1. Announcement:
    Want access to a chatbox?
    Dason ‎(Devorador de queso)
    05-10-2017
    Views:
    1,895
+ Post New Thread
Page 8 of 294 FirstFirst 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 58 108 ... LastLast
Threads 421 to 480 of 17594

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: 66,934
    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: 197,119
    07-16-2014, 11:01 AM Go to last post
  1. How to plot the following in R

    I'm looking for a way to plot the following information regarding projection matrices with R: 1) N(t) = total population size in year t 2) The...

    Started by ajk1982‎, 06-03-2012 03:30 PM
    • Replies: 0
    • Views: 919
    06-03-2012, 03:30 PM Go to last post
  2. Function to multiply matrices repetitively in R

    I'm looking for a way to multiple matrices several times in R using either a loop or function. I have a matrix A that is 4 by 4 and I need a...

    Started by ajk1982‎, 06-03-2012 11:56 AM
    • Replies: 5
    • Views: 4,774
    06-03-2012, 03:50 PM Go to last post
  3. Difficult Equilibria/Stability problem

    I need help solving the following problem: The initial values can be made up. I have done similar problems but the algebra for this is...

    Started by ajk1982‎, 06-07-2012 11:55 AM
    • Replies: 0
    • Views: 1,603
    06-07-2012, 11:55 AM Go to last post
  4. What is the difference (employment wise) between MS Applied Stats and MS Stats?

    Hello, I'm trying to find information on the difference between an MS in Applied Statistics and an MS in Statistics. I was under the impression...

    Started by ajk1982‎, 06-10-2012 07:18 PM
    • Replies: 0
    • Views: 2,619
    06-10-2012, 07:18 PM Go to last post
  5. Chi Squared Test (comparing to a normal distribution)

    I'm trying to figure out how to go about solving the following problem: A random sample of 64 cities in the US indicates the number of rainy days...

    Started by ajk1982‎, 08-28-2013 02:27 PM
    • Replies: 1
    • Views: 1,298
    09-10-2013, 07:12 AM Go to last post
  6. Solving a permutations-combinations problem

    Hi Could you please explain to me how to do the following question? "There are 12 beads in an urn, where 5 of them are blue, 4 are red and 3 are...

    Started by ajlovat‎, 03-27-2014 08:28 AM
    combination, permutation combination
    • Replies: 3
    • Views: 1,801
    03-28-2014, 06:02 AM Go to last post
  7. Test sensitivity for a given category or category sensitivity?

    Hello everybody, I want to study several parameters (i.e. sensitivity, specificity, precision and F1-score) of a given test. To do so, I'm...

    Started by AJLRB‎, 07-13-2017 05:43 AM
    • Replies: 2
    • Views: 419
    07-13-2017, 11:37 AM Go to last post
  8. Ordinal or nominal?

    I'm struggling to differentiate between different levels of measurements of variables. For example 'the level of motivation of conserving energy at...

    Started by ajm92‎, 11-28-2011 10:03 AM
    • Replies: 5
    • Views: 3,830
    11-28-2011, 02:50 PM Go to last post
  9. Post Weibull Distribution Problem Help (Theoretical and Matlab)

    Consider a Weibull distribution with the following pdf: f(x)= (Ɵ2/ Ɵ1)*(x/ Ɵ1)^( Ɵ2-1)*exp{-( x/ Ɵ1)^ Ɵ2} For x>0, Ɵ1>0, Ɵ2>0 (a) if now Y=( x/...

    Started by ajmal1075‎, 04-16-2013 11:41 PM
    • Replies: 5
    • Views: 4,907
    06-03-2013, 05:00 AM Go to last post
  10. Macro to calculate Regression between variables.

    Hello All, I am writing a macro to calculate the regression between each to variables among the 100 variables. My output is going to be a...

    Started by ajpnaveen‎, 05-19-2011 04:49 PM
    • Replies: 1
    • Views: 1,764
    05-20-2011, 12:04 AM Go to last post
  11. Macro to Cal regression between two variables (Mini__Tab)

    Hello All, I am writing a macro in MiniTab to calculate the regression between each to variables among the 100 variables. My output is going to...

    Started by ajpnaveen‎, 05-20-2011 12:05 AM
    • Replies: 0
    • Views: 1,703
    05-20-2011, 12:05 AM Go to last post
  12. Would P-value be same for confidence level 95 and 99 in simple linear regression

    In a simple linear regression task, I got same P-value for confidence levels 95 and 99. If above case is true Assume I ran a simple linear...

    Started by ajpnaveen‎, 04-07-2012 01:34 PM
    • Replies: 0
    • Views: 1,866
    04-07-2012, 01:34 PM Go to last post
  13. Hypothesis when seeking no differences

    Hi everyone, and thanks in advance for any help that is offered. I am working on my dissertation proposal and hit a bit of a wall when deciding...

    Started by ajr237‎, 03-11-2015 11:49 AM
    2 Pages
    1 2
    • Replies: 17
    • Views: 3,463
    03-17-2015, 03:00 PM Go to last post
  14. ANOVA past exam question help

    Hi everyone, I'm looking over last years exam paper and one of the questions asks me to interpret an one-way independent ANOVA SPSS output and report...

    Started by ajr237‎, 04-11-2015 06:01 PM
    • Replies: 0
    • Views: 875
    04-11-2015, 06:01 PM Go to last post
  15. Need help on Null and Alternative Hypothesis question

    The Problem: A national organization has been working with utilities throughout the nation to find sites for large wind machines that generate...

    Started by ajs‎, 05-02-2012 06:04 PM
    • Replies: 5
    • Views: 3,899
    05-03-2012, 02:22 PM Go to last post
  16. Question 2 x 9 Chi-square analysis

    Dear all, I am hoping for some advice/guidance on my statistical output. I have run a chi-square test in SPSS on a 2 x 9 grid. The output indicates...

    Started by ajt123‎, 06-01-2015 03:37 AM
    • Replies: 1
    • Views: 1,177
    06-01-2015, 04:33 AM Go to last post
  17. Question Statistically significantly different percentages, I do not know how to answer this.

    Adult Type 1 diabetics were randomly assigned to standard care or participation in a six week workshop lead by a diabetic specialist nurse. Of the...

    Started by ajuhasz‎, 03-14-2017 04:59 PM
    • Replies: 3
    • Views: 1,181
    03-15-2017, 11:40 AM Go to last post
  18. Question Comparison of ordinal data - same subjects, same questions, 5 years later

    Hi all, I'm looking for a good way to represent changes in ordinal-type data. I have 2 sets of data. In the first set, 50 companies (which...

    Started by ajvar‎, 10-16-2012 03:23 PM
    • Replies: 0
    • Views: 1,736
    10-16-2012, 03:23 PM Go to last post
  19. Help With Repeated Measures ANOVA

    Okay, so I have got 15 subjects, who had to perform a repeated sprint test (5 sprints) twice one with a supplement then the other with a placebo the...

    Started by AJW1995‎, 10-27-2014 05:27 AM
    repeated measures
    • Replies: 2
    • Views: 1,658
    10-27-2014, 07:15 PM Go to last post
  20. Question ANOVA? I need support/help with SPSS and Stats

    Hi, I have a group ( n = 8 ), whom performed 2 different exercise protocols pre/post a vertical jump test, these were (1) single set of squats,...

    Started by AJW1995‎, 12-28-2015 10:49 AM
    • Replies: 1
    • Views: 998
    12-28-2015, 12:10 PM Go to last post
  21. paper on statistics

    I'm doing a lab report aka paper on the "statistical analysis of the Precision of Electrochemical and Optical ph Sensors" I was wondering if there...

    Started by ajwrighter‎, 11-25-2007 03:55 PM
    • Replies: 0
    • Views: 2,551
    11-25-2007, 03:55 PM Go to last post
  22. Test of Significance

    I'm having trouble finding the P-Value and the Test of Significance: Zcrit and Ztest. This is data for pH values for electrode and optical) here...

    Started by ajwrighter‎, 11-26-2007 02:05 AM
    • Replies: 0
    • Views: 3,692
    11-26-2007, 02:05 AM Go to last post
  23. Help me explain to my professor why he is wrong. (Correlation coefficients)

    My professor (in psychology) has assigned the following question on correlation coefficients. Here is the question: What is the correlation...

    Started by ajwwong‎, 01-20-2010 12:53 AM
    • Replies: 2
    • Views: 4,834
    01-20-2010, 07:57 AM Go to last post
  24. Question Logistic regression with dummy variables and regular variables

    Hello. My logit regression for a sample of 182 has 4 significant explanatory variables. One of these variables is a dummy variable and the rest...

    Started by ak1190‎, 05-05-2013 02:50 PM
    dummy variable, logistic regression, mean wtp
    • Replies: 6
    • Views: 2,069
    09-18-2013, 08:04 AM Go to last post
  25. Unhappy i was left alone in my group i need help for next step

    this is my research problem and hypothesis Research Problem: Overall Performance of the Richard Electrical Services. Does the customer of...

    Started by akatzuke13‎, 04-10-2015 05:30 PM
    • Replies: 3
    • Views: 1,336
    04-11-2015, 11:28 AM Go to last post
  26. Critical values for cointegration test?

    Does anybody know where I can find critical values for the cointegration test? I need to know the critical values corresponding to how many...

    Started by Akavall‎, 08-17-2007 02:21 PM
    • Replies: 2
    • Views: 9,553
    08-18-2007, 10:17 AM Go to last post
  27. Dealing with autocorrelation.

    Every method I came accross so far uses some form of first-differencing, which kills my results. Is there any other way to deal with...

    Started by Akavall‎, 08-24-2007 02:16 PM
    • Replies: 0
    • Views: 4,932
    08-24-2007, 02:16 PM Go to last post
  28. Is it OK to lag first differenced variables?

    In a time series regression, where all variables are in first differences, to address the sationarity issue. Would that be OK to lag idependent...

    Started by Akavall‎, 08-30-2007 10:05 PM
    • Replies: 0
    • Views: 2,693
    08-30-2007, 10:05 PM Go to last post
  29. Is t-distrubution the same as standard normal at infinity?

    Hello, I am positive that t-distribution is exactly the same as standard normal if the sample size is infinitely large. I checked, mean,...

    Started by Akavall‎, 03-12-2012 10:46 PM
    • Replies: 3
    • Views: 2,657
    03-12-2012, 11:11 PM Go to last post
  30. I am not sure how Central Limit Theorem, and the t-distribution fit together.

    Hello, By Central Limit Theorem CLT if the sample size is large enough, the distribution of the sample means is approximately normal. This result...

    Started by Akavall‎, 03-13-2012 09:28 PM
    • Replies: 7
    • Views: 7,437
    03-14-2012, 12:36 PM Go to last post
  31. Graphing Effect Size Comparions

    Hi! I would like to take a single school's achievement data (as an effect size) and plot that on a scatterplot graph with the matched district and...

    Started by akbs‎, 08-06-2013 09:27 AM
    effect size, graphing, variable coding
    • Replies: 0
    • Views: 1,739
    08-06-2013, 09:27 AM Go to last post
  32. Exclamation Which Statistical Test?

    Hey all. I just performed a really nifty evaluation of a Zoo's educational program to determine the change in children's humane attitudes/behaviors...

    Started by Akelly1‎, 04-27-2012 01:29 PM
    statistics, stats, test
    • Replies: 5
    • Views: 1,661
    04-27-2012, 02:22 PM Go to last post
  33. Someone willing to check my work?

    This was a very basic investigation. School-aged children filled out one of two surveys (by reading level as described by parents, "older" and...

    Started by Akelly1‎, 04-27-2012 08:22 PM
    • Replies: 0
    • Views: 1,292
    04-27-2012, 08:22 PM Go to last post
  34. Yes/No Questionnaire Analysis

    Hey all. I'm having issues trying to figure out how to record and analyze some data I've collected. Here's the short story: 8 kids took before and...

    Started by Akelly1‎, 05-06-2012 08:40 PM
    • Replies: 9
    • Views: 17,038
    05-08-2012, 05:36 PM Go to last post
  35. Help with unbiased estimators

    I'm working on a homework problem and the question I'm stuck on is as follows: "Give an unbiased estimator for 2+3σ^2" I'm not sure how I...

    Started by akerkhoff‎, 12-11-2016 09:14 AM
    bias, elementary statistics, estimators, variance
    • Replies: 4
    • Views: 2,758
    12-11-2016, 04:37 PM Go to last post
  36. Help with data analysis of 7-Point Likert Scale needed

    Dear all, I'm investigating perceptions of effective leadership of Germans and Indians. Part of the questionnaire assessed the attitude towards...

    Started by akhdhr‎, 07-17-2017 06:57 AM
    likert, likert scale, questionnaire, scale
    • Replies: 0
    • Views: 479
    07-17-2017, 06:57 AM Go to last post
  37. Is my variable count or measurement and what statistical model would be best?

    I am trying to assess the fine-scale spatial distribution of tadpoles along a depth gradient in relation to abiotic and biotic factors -- and am...

    Started by akilles88‎, 06-21-2011 06:27 PM
    anova, chi square, distribution, ecology, transects
    • Replies: 7
    • Views: 4,089
    06-24-2011, 08:58 AM Go to last post
  38. Wich function do i use?

    Hello all, Im new to SPSS and i have a question about wich function i need to use. I have 3 variables in my SPSS: School year, year figure and...

    Started by Akkers1990‎, 04-19-2016 07:01 AM
    • Replies: 0
    • Views: 931
    04-19-2016, 07:01 AM Go to last post
  39. Significance of Simple Slopes in a 2-way interaction

    I have used simple slopes to test a two-way interaction in a regression model. However, I get 1-tailed and 2-tailes significance results. It is my...

    Started by akkurose‎, 02-14-2011 12:10 PM
    interaction
    • Replies: 7
    • Views: 8,730
    03-11-2011, 02:35 AM Go to last post
  40. How to convert statistical counting error into percent?

    Hello! I am trying to calculate appropriate error bars on a figure for a scientific paper. My original data was a simple count of # of photons...

    Started by aklytle‎, 02-27-2013 01:25 PM
    • Replies: 0
    • Views: 923
    02-27-2013, 01:25 PM Go to last post
  41. How to Analyze: Comparing two proportions

    Hello, I need advice on how to analyze a simple set of data. For simplicity's sake I'll make up the variables. Question: A store keeps track of...

    Started by akneidel‎, 09-16-2015 03:19 PM
    compare, proportions
    • Replies: 3
    • Views: 1,126
    09-17-2015, 07:58 AM Go to last post
  42. Comparing Two Rates, Unequal Time Periods

    For sake of simplicity I will make up an artificial example demonstrating my question. Say Player A scores 200 points in 800 minutes during a...

    Started by akneidel‎, 09-23-2015 05:14 PM
    • Replies: 1
    • Views: 1,172
    09-23-2015, 06:59 PM Go to last post
  43. Exclamation pls help decide test !!

    I have collected data of 100 patients who had low vision. All these patients were given a specific device and vision was noted before and after...

    Started by aksh12‎, 12-01-2012 12:06 AM
    • Replies: 3
    • Views: 1,538
    12-03-2012, 02:16 PM Go to last post
  44. Help with this Question

    Hey could someone please help me solve this question A garden supplies company sells bags of potting compost in a variety of volumes. One of...

    Started by akshay05‎, 02-20-2011 09:43 PM
    • Replies: 1
    • Views: 2,266
    02-20-2011, 10:09 PM Go to last post
  45. Statistical Analysis Intepretation

    Hi guys, first post here, be gentle :) I'm trying to get my head around some data in an RCT for part of a critical appraisal essay i'm trying to...

    Started by Ak_88‎, 08-16-2010 01:17 PM
    • Replies: 0
    • Views: 1,840
    08-16-2010, 01:17 PM Go to last post
  46. Why is Mann-Whitney more powerful than Wilcoxon (in my data)?

    I'm analyzing a repeated-measures ordinally-scaled variable in SPSS. I get more signficant results when I use Mann-Whitney tests (i.e. using the...

    Started by Al-Masudi‎, 05-03-2010 09:28 AM
    • Replies: 0
    • Views: 2,358
    05-03-2010, 09:28 AM Go to last post
  47. Planned contrast: opposite to predictions

    I conducted planned contrasts (based on a one-way ANOVA). One of them yielded a significant result in the direction *opposite* to hypotheses. (No...

    Started by Al-Masudi‎, 05-14-2010 05:19 AM
    • Replies: 0
    • Views: 2,564
    05-14-2010, 05:19 AM Go to last post
  48. statistic help !

    A and B are two events such that 0<P(A)≤1,0<P(B)≤1. Moreover, P(B|A)=1. Select the correct statement below. A. A and B are independent events. ...

    Started by al1121‎, 09-23-2014 07:47 PM
    • Replies: 3
    • Views: 2,484
    09-23-2014, 08:26 PM Go to last post
  49. Combination of two sample t-test and paired t-test versus MANOVA

    Hello! I'm conducting a study where I compare one design with another. For my experiment I have also used a control and a treatment group, and I'm...

    Started by al3xis‎, 05-23-2015 02:06 PM
    • Replies: 3
    • Views: 1,923
    05-27-2015, 03:57 AM Go to last post
  50. Multiple regression and logrithmic transformed model

    Hi How do i expand this cost function 3,629905+1,647x including INCOME, LABOUR, PHYSICAL and FUNDS (the cost function made only includes INCOME)?...

    Started by Alaababz‎, 06-05-2013 08:03 AM
    • Replies: 0
    • Views: 979
    06-05-2013, 08:03 AM Go to last post
  51. Comparing coefficients with different dependent variables

    I have the following problem. I have the following model I use per sector (for example: Industrial, telecom, tech etc.): cccountry = a +...

    Started by alain1985‎, 06-10-2011 10:58 AM
    • Replies: 0
    • Views: 2,159
    06-10-2011, 10:58 AM Go to last post
  52. MLE for multiple linear regression with errors that aren't IID

    Hi, I'm trying to make sense of a homework problem. I've done basic maximum likelihood estimation problems before but always with independent random...

    Started by alalia‎, 11-09-2010 06:49 PM
    • Replies: 0
    • Views: 4,079
    11-09-2010, 06:49 PM Go to last post
  53. goodness of fit test( chi square test)

    i want to find out test statistics and p value of different probability distribution by using chisquare test. distributions are 1. normal 2....

    Started by alam06es‎, 12-08-2015 04:53 AM
    • Replies: 0
    • Views: 1,223
    12-08-2015, 04:53 AM Go to last post
  54. Sample size for Cronbach's Alpha

    Hi all, I'm new for this forum,and I not strong in English language.I expect help from ur I want to know about the sample size for test of...

    Started by alamp‎, 08-18-2009 05:37 AM
    • Replies: 1
    • Views: 5,285
    08-18-2009, 07:57 AM Go to last post
  55. Need some help! for Sensitivity analysis

    Hi, I'm Thai. I studying in master degree in Public Health in Thailand. I peformed the simple logistic regression for examined the ability of the...

    Started by alamp‎, 02-05-2011 07:06 AM
    • Replies: 1
    • Views: 2,047
    02-05-2011, 12:38 PM Go to last post
  56. Question about small sample difference between two means.

    Hi, I was always told when I was using two small samples (n1 < 30 & n2 < 30) in a difference between two means test to assume that the population...

    Started by alan4cult‎, 05-07-2009 01:53 PM
    • Replies: 0
    • Views: 2,607
    05-07-2009, 01:53 PM Go to last post
  57. Question How can I use likelihood ratio test with my estimation problem?

    I have a database that contains samples from two families X_1....X_n~iid Y_1....Y_m~iid I assume (even though it isn't true) that the samples...

    Started by alanh‎, 05-15-2013 06:22 AM
    • Replies: 2
    • Views: 853
    05-15-2013, 08:01 AM Go to last post
  58. Sample size estimation in Inter-rater reliability. Please help!

    Hello, I'm beginning my thesis project evaluating the inter-rater reliability of a risk assessment instrument. 90% of data is nominal (Y/N/DK) and...

    Started by AlanS‎, 02-02-2009 01:04 PM
    • Replies: 0
    • Views: 4,702
    02-02-2009, 01:04 PM Go to last post
  59. average of percentages

    I'm looking for a way to guage performance of website referrals over many websites. I'm not sure the number of referrals for a particular website is...

    Started by alanv‎, 10-14-2010 10:50 AM
    • Replies: 1
    • Views: 4,171
    10-14-2010, 03:14 PM Go to last post
  60. Help! How to choose my data bucketing!

    Hi all! I have a very specific problem... I'd like to bucket my data (around 15k samples) into 50 buckets, but i don';t know how to most...

    Started by Alan_UK‎, 11-10-2011 09:18 AM
    bucketing
    • Replies: 2
    • Views: 3,165
    11-10-2011, 09:27 AM Go to last post

+ Post New Thread
Page 8 of 294 FirstFirst 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 58 108 ... LastLast

Thread Display Options

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.

Order threads in...

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

Icon Legend

Contains unread posts
Contains unread posts
Contains no unread posts
Contains no unread posts
More than 15 replies or 300 views
Hot thread with unread posts
More than 15 replies or 300 views
Hot thread with no unread posts
Closed Thread
Thread is closed
Thread Contains a Message Written By You
You have posted in this thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts






Advertise on Talk Stats