# All Questions

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### Hypothesis testing- with normal approximation

In Europe the diameters of women's rings have mean 18.5 mm .Researchers claim that women in Jakarta have smaller fingers than women in Europe .The researchers took a random sample of 20 women in ...
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### Creating a single scale using multiple variables

Hello everyone I am new to the forum. I have a question about how to operationalize variables in survey data. So, The survey asks respondents to give their opinion on a number of issues. There are 6 ...
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### Calculating annual returns of Bid using R

I want to solve the following problem using R. A chit fund has 25 members. Each month they contribute Rs 2000 each. End of the month, the person who bids the lowest for the corpus, gets his bid. The ...
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### What is Importance Value?

I am reading this paper that talks about Principle Components analysis and Importance Values(IV) here Is this Importance Value a statistical concept? I could not find any information about it in ...
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### Extracting the functional form of the likelihood from the function msm() in R

Is there a way of extracting the functional form of the likelihood function that gets formed by the msm function in R? How can I extract the likelihood function ...
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### asymptotic distributon, posterior mean

Suppose $X \sim Bin(n, \theta)$, $\theta \in [0,1]$. Considering a prior distribution for $\theta$ from $Beta(a,b)$, we get a posterior distribution $\theta|X \sim Beta(a+X, b+n-X)$ and so we get the ...
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### Equivalence Testing in multivariate regression models

This questions seems to have been asked, but never answered before. The question I have is: is it possible to implement the idea of equivalence testing in multivariate regression models? For example, ...
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### How the values in word2vec embedding are created for each word

I was going through word2vec materials from Andrew Ng's course and below is what i understood. -> Step1 A matrix of shape embedding_size*number_of_unique_words is created and populated with random ...
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### Statistical test to verify if a population has a average of k times another

Consider the situation where there are 2 positive distributions with unknown expected values $\mu_1$ and $\mu_2$, We have samples $S_1 = \{x_1, x_2, ..., x_n\}$ and $S_2 = \{y_1, y_2, ..., y_n\}$. ...
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### Comparison of MAE and Mean to illustrate the error magnitude

I have predicted a time series with positive, zero and negative values. As error measurement I used the Mean Absolute Error (MAE). In order to give the reader of my paper a better understanding ...
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### which interactions to explore between sex, age, height to predict weight

As a learning exercise I'm running linear regression to predict person's weight from: sex, age, height. here's a few sample lines ...
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### If x out of y choices are more likely to happen, how likely are the x choices?

If there are y choices that survey takers can pick, and generally all are equally likely, but for a certain subgroup, x of those choices are a certain percent more likely, what is the probability of ...
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### Smooth bivariate interaction decomposition in GAM models

Background Consider the following additive model containing a smooth bivariate interaction term: $y = f(x,z) + \epsilon$ where y is a continuous outcome variable, x and z are continuous ...
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### If the loglikelyhood function of $Y$ is $\log \binom {N}{Y}+Y \log p+(N-Y)\log (1-p)$ what is the meaning of “$Y$ is linear in $\log \frac {p}{1-p}$”

If the loglikelyhood function of $Y$ is $\log \binom {N}{Y}+Y \log p+(N-Y)\log (1-p)$ what is the meaning of "$Y$ is linear in $\log \frac {p}{1-p}$" The following taken from a book by W. Stroup on ...