View Full Version : Statistics
- Grouped data mean
- Linear regression : the covariance between y_i and y_i hat ?
- Covariance between linear combinations?
- Need Help Combining 6 Graphs into One
- Geometric mean of normally distributed independent random variables
- Post-hoc comparisons of main effect with significant interaction.
- Writing the Regression Equation
- Two Tailed T Test help
- Quartiles Problem
- What are some statistical tests for the relationship between two variables?
- What can of analysis to use - Correlation between drivers and forest carbon storage
- Backing out standard errors on regression betas from Least Significant Differences
- [SOLVED] Beta weights vs. angle in degrees
- Autocorrelation help
- How best to analyze this data?
- no enough information for doing this 2 Qs?
- measuring evenness
- t test for indepent means
- How to test if my correlations are statistically significant?
- Tests about a popultaion proportion
- Anyone familiar with the Lo Mackinlay Variance ratio statistic/test?
- Interpreting Range and Inter-quartile Range
- non-parametric statistical test to compare two classification methods performance
- permutations
- Outliers and 5% trimmed means vs true mean
- Correlation
- Transformations - variables at different time points
- Hypothesis testing
- Finding MLE with expected probabilities and observed frequencies.
- Mysterious probability problem wants to solved!!!
- Wilcoxon signed-rank test - Can I use for this case?
- t-test/linear modelling
- the negative binomial distribution
- Post-hoc multiple comparisons of slopes?
- Does my data fit to Poisson distribution
- [SPSS] Mixed Models - How To?
- Help! Predict average Variation of commodity price for next year
- mathematical expectation
- Experiemntal design query
- Ordinal Data
- How would you find the folllowing
- Help with golf foursomes
- Need a bit of help on the following questions:
- Help with Bonferroni Method
- Zero Truncated Poisson
- Additive/cumulative probabilities
- Correlation Analysis Against Artificial / Ranked Factor(s)
- Means and Standard Deviations of Ratios
- Which type of regression should I use?
- Cognitive Dissonance about Likert Scale
- Linear Transformation Problem
- Poisson Regression Estimates
- Probability--Deck of Cards
- continuous random vairble problem
- Economic students data
- Which ANOVA to use? PLZ HELP :(
- non parametric 2 way anova
- How to calculate the overall mean of several Likert scale data?
- how to calculate the min, max, mode and the median
- Having trouble solving this stats problem!! need help!
- Mauchly's test
- HELP! "Weighted Pair"
- why the SAMPLESD has a smaller bias but a larger SE than the POP SD
- report and interpret effect size...SPSS
- Normal Distribution and Sampling
- Help reading a line from a study with 95% CI and p value
- gamma distribution
- Compare two percentagesL which test?
- Effect size
- what kind of media use?
- Student's t-distribution table
- Database response time, which might be the best statistic to determine response time?
- [Students T Test] - paired or unpaired unequal variance?
- Quotient of confidence intervals
- Projecting random numbers from historical data
- Correlation as standardized factor loadings
- Homework Help Testing Correlation Coefficient
- Greek letter "rho"
- Bias of the ratio estimator for pop. mean
- How do I prove something is a variance matrix?
- Measurement error effect on Z score calculation
- a problem of MLE
- Significance test/comparing results
- type 1 and 2 error easy help please
- Which statistical technique should i use?
- Theory testing
- Showing Proof for an OLS Model
- Can anyone help advise me re the best stats test to use?
- How to extract similar groups from a sample
- More Advanced Book Recommendations
- Latin Hypercube - Monte Carlo Sampling ~ VBA CODE
- Confidence intervals for ratio of two means with limited data
- Confidence Limit
- Poisson Distribution problem again...
- Really Basic A level Statistics Test. (Multiple Choice)
- Signifcant Difference in Beta Coefficients
- Significance testing for change in means?
- Presence/Absence data- test for differences between groups
- Patient info, diseases, treatment. How do I get the most out of this table.
- Null hypothesis
- gaussian ARMA process with non-gaussian errors
- Linear Regression Question
- linear regression problem
- MultiComp Test for Binary Data
- Correlation-like analysis with several categorical variables
- Rating scales -- meaningful summary
- Interactive terms
- Computing the equivalent t-statistic from F distribution value
- 3-way ANOVA: df=0 ?!
- Main effects ANOVA vs. multiple 1-way ANOVA
- Discriminate Validity with CFA
- paired t-test?
- Test hypothesis
- Transforming data using natural log function?
- Which Significance test do I use?
- Z scores...
- help! sample mean problem!
- Help!
- Testing the probability of a discrete uniform distribution from a sample.
- Comparing Variances
- Help with a Kernel smoothing function
- Help in descriiptive statistics
- Transforming two non-normal sets of data for 2 sample t-test?
- calculate Rho & Test the significance of Rho
- Creating Hypothesis
- SPSS Help
- Is t-distrubution the same as standard normal at infinity?
- non-sign due to low power - what to do next?
- Pool data from individuals in sign test or Fisher's exact test - valid or pseudorep?
- sample mean/calculus??
- Advise on best statistical test.
- aggregation over groups vs. rounds
- Sample Surveys
- Beginner Statistics Help
- I need help with Null Hypothesis type 1 and 2 errors
- Distribution
- Penalty (mean-drop) anlaysis software
- Immediate help needed with sampling
- I am not sure how Central Limit Theorem, and the t-distribution fit together.
- How many yellow balls in the basket?
- Advice to improve Monte Carlo Simulation (Uncertainty Analysis)
- Probability to partake in either of two activities
- Normal distribution time series
- Which hypothesis test to use?
- Identifying appropriate statistical test
- Post-hoc following GLMM
- Structure equation model formulas
- Help required for correlation of three dependent variables
- Newbie, got no idea, some questions.
- The rule of approximating quadratic to Linear
- question
- Interesting problem calculating estimators from set of sums
- Determining Skew of Data Set of Standard Deviations
- How to check association between an interval variable & nominal variable?
- 3-way anova, following up 2-way interaction
- HELP me out plz!
- Need a help for sample size calculation
- Project - t-test vs. anova
- 2 Independant Groups analysis HELP
- Logistic Regression on data with logged Binary Responses
- Unusual Results - Please shed some light
- Seven Year and Two year intervals
- Convenience sampling in online survey
- define power using power and sample size calculator
- Cannot figure out why I am getting this T-stat question wrong.
- Showing differences between power laws in network graphs
- correlation non-independent data points
- wich statistics for my study
- Having trouble identifying orthogonal contrasts
- confused by this statement on bivariate and multivariate
- Significance of having a Confidence Interval with 1 in it
- Hypothesis testing - which method to use?
- bias of an estimator
- ANOVA Questions
- How does R count p-values?
- Proportions and power of the test
- Wilk's theorem and regularity condition
- Tukey vs. least mean squares - or same thing?
- Is my sample OK?
- Traffic Problem
- Stat Test with 3 categorical variables - I want to include on of these as a covariate
- When homogeniety of regression slopes is violated.
- Multivariate regression equation
- sample variance - unbiased estimator for population variance
- Computing Expectation involving indicator function. Help needed
- Very confused about missing data and EM for (mainly) ordinal variables
- How to assess "degree of change" between two continuous variables?
- What test of significance should I use with two arrays of percentages?
- Confidence intervals
- Quality Control
- Kmeans clustering
- Which Stats test do I need to use??
- One sided confidence intervals?
- t-test
- distribution
- Analysis of soil fertility - Looking for guidance/confirmation
- How many times must be divided the CDF vertical axis in Latin Hypercube Sampling?
- Factor Analysis-Why Rotation Failed?
- Parameter of Holt's Exponential Smoothing
- Heirarchical multiple regression
- Ranking multiple lickert scales
- Sample size too small - any alternatives?
- Acceptance Sampling
- Frequency Factor K for the Log Pearson 3 distribution
- Excel weighted regression
- degradation data small sample size
- Anova - GLM _repeat measure
- confidence intervals
- Normality Assumption assistance
- MANOVA assumption out sample size
- Finding Quartiles in a normal distribution
- Confidence Intervals
- Parametric or non-parametric for 2 sets of data being compared one normal one not
- Computing Regresion analysis
- Stats categorical value help
- Which test should I use? help?
- Is factorial ANOVA the correct test to use in this situation?
- Complex ANOVA, covariates and familywise error - which test to use?
- Detecting Outliers
- What can you say about the Normality assumption in this Quantile plot?
- Loess CI for Yhat
- the second, third, and fourth order moments of OLS residuals
- Regression equation: Predicting X from Y
- Simple Question Re. ANCOVA
- SPSS Question
- Uric Acid Level
- Need Stats Help! Please!
- how to get the posterior distribution when given a prior distribution and data
- Does proc glm constitute robust regression?
- Blood Glucose Levels over Time - Statistical analysis?
- When to enter a confounder into a hierarchical regression model?
- Interpreting Confidence Intervals? (BASIC)
- Linear Regression: how to tell if factors "disagree"?
- Monte Carlo Simulation - Distributions - Inverse CDF Method
- How to test relation of two variables
- Cumulative probability function of quotient of two random variables
- reporting descriptive stats
- Beginner struggling with point biserial - first post!
- Permutational multivariate analysis of variance using distance dissimilarities
- sufficient statistics
- Converging Data
- 4 unbalanced groups. Bonferroni/Tukey with proc glm okay to compare means?
- UCL and LCL Problem
- Chi Test Homework Check
- Moran's I question
- Statistics and data analysis in excel?
- Help with some statistics?
- error in SPSS output
- Help MANOVA, interaction, simple effect
- 2-sample t test - interpreting results
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