1. B

    Difference between Mann-Kendall and Pearsons Correlation to obtain p-value

    Hi, I am carrying out an analysis about Vegetation and Time. I did a simple linear regression and I got the correlation between both variables (Pearsons). Now, I would like to get the significance of the data. I got the significance (p-value) carrying out "Pearsons Correlation" but my question...
  2. A

    My data does not follow a normal distribution, but Mann Whitney U test gives me a p-value of 0.935?

    As the question indicates, I conducted a normality test on Minitab, and the p-value I received was 0.018, which is less than the significance level, therefore, it is not normally distributed. Therefore, I had to conduct a non-parametric Mann Whitney U test, and the p-value is 0.935, which...
  3. A

    AMOS - interpretation of bootstrap indirect effects for one-tailed hypothesis

    Hello all, I'm testing for mediation using bootstrapping in AMOS. This method reports results for two-tailed significance, but my hypotheses are directional. With bootstrapping, significance is assessed based on confidence intervals - though a p-value is also provided. For regression, I would...
  4. M

    P-value - Parametric Vs Non-parametric

    Greetings Is it possible to compare the p-values derived from non-parametric tests to parametric tests? For example, lets say dataset 1: Copper concentration in spoil is not normally distributed, so I have to use a non-parametric test on it and get a p-value. Dataset 2: copper concentration...
  5. C

    Statistical significance

    Hi, I have the following problem and I would need some piece of advice to solve it: I have a group of 28 patients (17 survived, 11 died) and I am trying to find out if some of quantities are capable of discriminating survivors from non-survivors with a ROC analysis. For all the considered...
  6. N

    Question regarding RM ANOVA

    Dear readers, I have a question regarding my output from the repeated measures ANOVA. For my paper I have hypothesized that Dutch, masculine voices in men were more attractive than foreign, masculine voices in men for a short-term relationship. My results from the three-way RM ANOVA were...
  7. N

    Question regarding Repeated measures 3-way ANOVA for thesis

    Dear Readers, I am new to this forum and I have a question regarding my output/researchdata. I am currently analyzing my hypothesis with respect to masculinity preference for voices (masculinized voice/feminized voice) and mating strategy (short-term/long-term). My hypotheses is that(a)...
  8. B

    SPSS Complex Samples Logistic Regression

    Hi all, I am hoping this is a simple question... I am using SPSS for complex samples and in my logistic regression output I do not have any p-values for the significance of my variables. Does anyone know where I can get the p-values in my output of logistic regression of complex...
  9. E

    Estimating probability of critical value

    Hello everyone, Once we get a critical value (for example 4.5) how can we estimate the probability of having a value higher than 4.5 if the probability distribution is not normally distributed? I leave in attachment a picture of the histogram that I get. Thank you very much for all the...
  10. M

    SigmaPlot 12.5 - Kruskal-Wallis followed by Dunn's post hoc - how do I get p-value?

    Hello, I've been using SigmaPlot12.5 to run nonparametric Kruskal Wallis test, followed by Dunn's post hoc. When I get the read out for "All pairwise comparisons," the results only tell me if the P-value is less than or greater than 0.05. Is there a way to have the program provide the specific...
  11. A

    p-value NaN on ANOVA

    Hi All, I am using an online 1 way ANOVA calculator for a medical stats (I am a novice!) but I end up with a p-value that is not a number (NaN). I have 3 samples... If anyone could kindly shed some light it would be much appreciated! I can provide the raw data if necessary. Many thanks...
  12. B

    Finding the p value

    I am taking a statistics class, and i have some problems Understanding a formula. The formula in question is like this: p-value=2P(T>|t_obs,beta_i|) I have calculated the t_obs,beta_i, but i do not understand what i am supposed to do in this next step. specifically, i have no idea what...
  13. M

    Fisher's exact test - two-tailed

    Hi guys, I performed a fisher's exact test on Genstat and got this result: One-tailed significance level 0.563 Mid-P value 0.371 Two-tailed significance level Two times one-tailed significance level 1.126 Mid-P value 0.741 Sum of all outcomes with Prob<=Observed 1.000 Mid-P value...
  14. H

    Power function - finding if the slope is significant or not?

    Hi, I'm using power functions to look at a relationship between time and age and I need to be able to test whether or not the slope of this relationship is significant or not. I am using SYSTAT, but cannot find out how to run this and produce a p-value. Is this not possible to test at all...
  15. M

    Multiple, hierarchal regression - division of p-value?

    Hey everybody! I am pretty new to this forum and also to statistics. In these days I try to analyze the data for my Bachelor thesis. I study psychology in the north of Germany. Well, my questions refer to the process and the output of my multiple, hierarchal regression. I have two...
  16. K

    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 size? Are there any other critical factors involved in this relationship? I'm basically looking to understand how these factors are linked...
  17. J

    How do I test the significance of my correlation coefficients for various regressions

    Hi, I have a set of 25 points and I used a TI-84 calculator to calculate the linear, quadratic, logistic, exponential, and power regression models for this data set. I have, likewise, obtained the r^2 value for each of these regressions. Some of these r^2 values appear to be quite similar. For...
  18. W

    Is it meaningful to calculate a p-value based on a convenience sample?

    Ignore the bootstrap as a possibility. If the answer is no, then what is the point of stating the p-value (especially if it is, say, 0.10)?
  19. C

    Pleease help!? Filling in "blanks" in Regression Output

    Hello! Can someone please explain, I need to fill in the blanks marked They provide this info in a row: Coeff:-9074.674 Std.Err: ?? p-value: 0.000 95% Conf.Intervall: -13272.86, -4876,485 How do I calculate Std.Err & t-stat here? Please help me, thank you! :) Best Regards
  20. R

    Conceptual queries in modeling

    Hi all, I am from engineering background. I would require your help in certain conceptual questions in modeling. Your help would be greatly appreciated! Following are my few questions... (Pointers on these questions would help me , else you may direct me to any useful resources.) 1)If a...