Hypothesis testing assesses whether data support a given hypothesis rather than being an effect of random fluctuations or some other process described by an alternative hypothesis.

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Why does this inequality about the false discovery proportion hold?

I am reading an article from Statistics in Medicine ("Tutorial in biostatistics: multiple hypothesis testing in genomics"). For my question it is only relevant to know that $V$ denote the number of ...
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7 views

Multiple comparison in the hypothesis testing in different segmentations

I have a question regarding multiple comparison in different segmentations of the A/B testing data. Do i have to correct p value if the underlying data are different for each test or is it only ...
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14 views

Is there a test suitable for the analysis of my data?

I am trying to compare the performance of pipelines. These pipelines have been sorted into two groups, Insulated and Non-Insulated. I have a total of roughly 60 pipes which are a combination of ...
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1answer
22 views

Poisson normal approximation for comparing means of count data

I'm trying to compare the values of two counts from an A/B test, $c_1$ and $c_2$. If I assume the data is Poisson distributed then the mean and variance are $\lambda$ and the standard error is $\...
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1answer
25 views

Should I use vce (robust) in a single year regression model?

Should I use vce (robust) in a single year regression model? The regression is for diversity measurement among 66 organizations in one year only
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18 views

Robust one sample tests of variance or scale

A common one sample test for variance is the chi-square test, e.g., http://www.itl.nist.gov/div898/handbook/eda/section3/eda358.htm. What are some robust testing alternatives for variance when the ...
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17 views

How to calculated test F with only output glm?

I have to calculate the value of the test F (no software needed ) . I read several notes, but I can not understand how I do . The idea is to take Null deviance and Residual Deviance and split in some ...
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11 views

Is the Scheffé test of contrasts the “best-case” for post-hoc tests?

I am reading through Explaining Psychological Statistics, 4th Edition and am stumped after the following passage: Scheffé (1953) understood that the best anyone can do when creating a complex ...
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12 views

How to Analyze Likert Scale Data Using Statistical Tools?

I'm doing an MBA dissertation on the topic "Impact of Customer Service Satisfaction on Business Performance". The hypothesis set is "Customer service satisfaction can positively impact business ...
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3answers
404 views

Hypothesis testing. Why center the sampling distribution on H0?

A p-value is the probability to obtain a statistic that is at least as extreme as the one observed in the sample data when assuming that the null-hypothesis ($H_0$) is true. Graphically this ...
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2 views

Difference between skeleton and medial axis [on hold]

Guys I'm having serious troubles of finding the differences between a skeleton of a 2D object and a medial axis of a 2D model. Wherever I look it comes up that they are the same . But I think they are ...
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1answer
51 views

Hypothesis testing with an unusual alternative hypothesis ($H_1:\mu = \mu_1$)

Usually I am very familiar with how to do hypothesis tests, but I have never seen an alternative hypothesis where $\mu$ is equal to a particular value. How would one proceed in this situation? This is ...
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14 views

How do you stop difference in power from biasing comparison of statistical tests?

I have two sets of values A and B, and I am conducting a Mann-Whitney U test (the distributions cannot be assumed to be normal) on these sets. However, I have an a priori hypothesis that some values ...
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3answers
96 views

Basic Hypothesis Testing

I'm having trouble with a basic hypothesis testing question that I just thought of. The question is the following: suppose you know that a certain lawnmower manufacturing company (called Company A) ...
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0answers
21 views

How do I test whether means are equal when I have summary stats for 2 samples from one population and for 1 sample from a second? [duplicate]

I think this is a "meta-analysis" situation. I've got 3 samples (from 3 studies); I've assumed that two are from population A (treatment A) and one is from population B (treatment B). I have the ...
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12 views

Should I include the level variables along with the difference variables in the Error Correctional Model(ECM)?

I am running an ARDL model, I have both levels and difference variables. I know for sure that the difference variables should be included in the ECM but should I include the level variables as well?
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21 views

Hypothesis testing for quantiles

Suppose we want to test $H_0: q_\tau=q$ vs. $H_a: q_\tau>q$, where $q_\tau$ is the quantile of order $\tau$ of a certain population. A popular test for this hypothesis is the sign test, which ...
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1answer
41 views

Hypothesis testing with quotient of regression coefficients

Suppose we have the following multiple logistic regression model $\beta_0 + \beta_1 X_1 + \beta_2 X_2$, where $X_1$ and $X_2$ are binary variables, and $\theta = \beta_1 / \beta_2$. Then I have two ...
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16 views

BH procedure for FDR [closed]

If we will use the BH procedure at level q we know that the FDR will be lower then $\frac{m_0q}{m}$ when $m$ is the number of the overall comparisons and $m_0$ is the number of true null hypothesis ...
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8 views

Which tests to perform for quantitative surveying using likert scale? [closed]

Am in an urgent need of help to complete my master thesis report. Any support would be highly appreciated. My study is on impact of emerging technologies on teaching and learning. I have identified 8 ...
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10 views

UMP test for 1-sided hypothesis: Why the focus on the monotonicity in the sufficient statistic, and not in the parameters?

Let's assume that we have $X_1,...,X_n\sim^{iid} Exp(\theta)$. The LRT is of the form $\Lambda(X,\theta_0,\theta_1)=e^{\left(\frac{1}{\theta_0}-\frac{1}{\theta_0}\right)\sum X_i}$. When $\theta_0<\...
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38 views

Proper statistical test selection / SPSS setup

UPDATE: Basically, my question boils down to, how can I compare the distribution of yes's and no's BETWEEN multiple subgroups to see if their difference is statistically significant (and get a p value)...
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1answer
16 views

MANOVA interaction effect wont compute

I am performing a MANOVA with a large multivariate dataset representing total body shape (dependent variable). My two independent variables are gender (sex) and cluster (from a previously computed ...
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15 views

Pareto Analysis for Hypothesis Testing, Is it Ok to do so?

I have a problem of hypothesis testing. Hypothesis H1:- All factors of the strategy verticals are not equally important A Strategy - 14% B Strategy - 12% AB Strategy - 20% BC Strategy - 17% AC ...
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1answer
41 views

What statistical test to use - comparing models?

Say, I have created 3 models that evaluates the amount of harmful pollution. It uses a variety of factors (location, time of year, etc.) to determine this. I have a bunch of data for 10+ Cities from ...
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1answer
52 views

Why would you want a smaller critical region when testing large samples?

Is it because when you have a smaller critical region you have a smaller probability of the event happening?
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1answer
31 views

Wilcoxon Signed Rank vs Bootstrapping for Skewed Cost Data

I'm currently looking at non parametric cost data (highly skewed to the right), and I'm trying to compare cost data pre and post intervention. Traditionally I've been taught that due to the non ...
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21 views

What's the difference between 'anova' and formulas?

If i want to test the additive (no interaction) hypothesis given some categorical factors, I can do it in two ways: Firstly, I have, in select "nice" cases, formulas that I can use to explicitly ...
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1answer
55 views

Why Yates correction in McNemar's Test subtract 1?

McNemar's test statistic is given by: Yates's correction defines something like this: However, the correction for the McNemar's test statistic requires 1 (not ...
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28 views

Investigating main effect after controlling for guessing

I'm doing a multilevel logistic regression with the dependent variable being word learning scores (Score). There are two independent variables: Condition (Experimental / Control) and WordType (Cognate ...
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15 views

Confirmatory Hypotheses

For my thesis I am examining the role of insight in the entrepreneurial opportunity recognition process. My hypotheses are: ...
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1answer
68 views

Beginner question on dice roll statistical test

I have 2 cohorts of 10,000 people. I give each person in cohort 1 a die $a$, and ask them to roll it. I record the values as a tally. I then repeat this process with cohort 2 and give them die $b$. I ...
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1answer
19 views

Statistical Test for Embedding?

I have a bunch of labeled objects. Let's say there are K classes altogether. Now suppose every object is mapped to a data point in R^n, or in other words, is embedded in R^n. Ideally a good embedding ...
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12 views

Eigenvalue ratio test for signal detection

Good day. I’m trying to perform an eigenvalue ratio test for signal detection (using Wolfram Mathematica). The problem under consideration comes from signal processing. Under hypothesis $H_0$ one ...
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10 views

Which test is appropriate when comparing proportions of a sample to a subgroup of that same sample?

I have sample of patients and their demographic information. A subset of this sample is identified as having a particular genetic marker. I'd like to know if the subset with this genetic marker have ...
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18 views

Check if my selection is better than a random selection from the population

I have a list of variables with scores associated with each of them (17k variables, scores are not normally distributed). I independently select a small number of these variables (10-30) and get the ...
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27 views

Statistical Tests with Vectors and Point Clouds

I am currently running an experiment where the data I obtain is in the form of vectors and point clouds. Specifically, there are 3 main pieces of data I get for a given trial: 1) Two vectors in 3D ...
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1answer
39 views

Sequential parameter estimation of multiple discrete random walks

We have $M$ Bernoulli random walks, $X_1$ has parameter $p< 1/2$ and all the rest have parameter $1/2$. The steps are $\pm 1$. I want to identify the parameter $p$ random walk with probability of ...
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13 views

Is this a one-way ANOVA?

I have data from a survey question in which half of the participants answered it at the beginning (Before) and half at the end (After). The question involved self-selection into one of four scale ...
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26 views

What is it that you're doing when you do a single t test on one predictor of a multiple regression model?

I hope my interpretation is correct. When you're doing a t-test on a single predictor of a multiple regression model, are you looking at how it behaves while the other coefficients are fixed?
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31 views

Can I flip the null and alternative hypotheses for logit regression in R?

I would like to accept the hypothesis that a variable is insignificant in determining the dependent variable of a logistic regression, but in R the glm summary which contains the p-values for each ...
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57 views

What statistical test to use when some participants receive multiple treatments?

I have N participants, some of them are on drugs A, B or C, exclusively (no overlapping). I know how to do the hypothesis test in this case. But what if I have a small subset, say n, of these ...
3
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74 views

Single Sample t-test Hypothesis Confusion

In case you want data set.seed(100) hotel <- rep(1,100) hotel <- unlist(lapply(hotel, function(x) { runif(1,1,5) } )) NULL Hypothesis :- Hotel rating is ...
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11 views

choosing test set in a seasonal time series

The data is sequential, but not necessarily continuous, ie. there are multiple gaps between the start and end date. I fit a regression model, which may or may not involve lagged variables, and I want ...
3
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34 views

How to use SPSS to perform a 2-tailed Binomial test

Supposing we have 0,1 labeled samples, when I using SPSS to perform a binomial test, and to see if case 0 and case 1 has equal proportion(0.5), the software automatically pick a two-tailed binominal ...
0
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1answer
78 views

Type 1 or Type 2 error

Merritt’s et al.’s (2002) study included a sample size of 21 in the intervention group and 18 in the control group. Given this information, are the researchers more likely to commit a Type I or a ...
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1answer
78 views

The true meaning/difference of alpha values and p-values

EDIT: I may have been confused by the confusion of others. In any case, it helped a lot when I came to know that the $p$-value is stochastic. It does make sense, given the $p$-value is a ...
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1answer
30 views

Performing a t-test with discrete (currency) data

I want to perform a 2 sample t-test assuming unequal variances, however my variable is currency. Currency is discrete, however when checking the assumptions of the t-test, I see that the data should ...
3
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1answer
43 views

Null distribution of fisher's exact test; where the nullity is used?

For 2x2 contingency table, we can test independence of row and column variables by using Fisher's exact test where we assume all marginals are fixed. ...
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22 views

Same mean, different variance - test?

I have conducted an experiment where I am interested in how well different models for directional hearing works. For each model a sound is presented to a test subject, and the test subject expresses ...