# Questions tagged [mean]

The expected value of a random variable; or a location measure for a sample.

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### Why don’t we calculate the average of an entire given population instead of computing confidence interval to estimate the population mean?

We compute confidence intervals to estimate the true population mean of either a sample (when population standard deviation is unknown) or an entire population (when population standard deviation is ...
1 vote
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### Verify relationship between a categorical and numerical variable

I have got some data about movie directors and number of cuts per minutes in their movies. I whould like to verify if there is any relation between this two variables. I have tried looking at the mean ...
14 views

### Different Number of Judges Scoring and how to Rank

I have looked everywhere and I am struggling to find a solution. Granted, I am no statistician but I do have some knowledge of basic statistics. Any help is truly appreciated! There are a number of ...
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### Computing Variability Independent of mean; differences in calculation methods

This question is mostly about another post here on stats.stackexchange. In general, VIM (Variability Independent of the Mean) is usually calculated, as the name suggests, to calculate the variability ...
22 views

### Find mean value of total N with only relative frequency and mid point histogram [duplicate]

I have the following data of number of vouchers redeemed : How can i calculate the mean value of total vouchers?
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### Is winsorizing limited to the usage of a certain percentile cutoff?

The Context My dataset consists of 68 groups, each with 4 data points inside it. As means of a robustness test, I am looking to see how the type of average/mean I use impacts the analysis that I will ...
1 vote
35 views

### Help with table interpretation

I am an agricultural genomics student and I need help understanding this table of statistics from a study of 1340 cows. can you please explain to me what it means when the mean value is 0? and how to ...
24 views

### Formula to determine when mean is stable

I have a sample of values. Every day the sample grows because new values will be added. Every day I calculate the mean of these values. For research purposes I want to know the day that the mean ...
1 vote
34 views

### Bootstrap Standard Error vs Standard Error from sample

For doing inference of a population parameter from a sample, under which examples is better to calculate the standard error using bootstrap distribution of the mean than directly using the standard ...
1 vote
31 views

### Comparison of total counts vs. comparison of mean counts per participant in exploratory data analysis

I already came across this question: Difference in means vs difference in proportions, but could not answer my question based on the answers and comments there. My question would be this: Suppose ...
16 views

1 vote
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### Difference in means vs OLS regression coefficients

Suppose I have a data set where each row represents a test subject. There's a dependent variable (y) and two binary columns (x1, ...
1 vote
127 views

### Standard deviation on Bimodal data

Standard deviation, whilst it is often used on normal distributions, is it a useful statistic on global temperature, both daily and yearly, given that weight of the data is towards the ends of the ...
1 vote
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### Examining stationarity, mean and variance of time series

Hi guys, I encounter this question for a Business Forecasting module and I am very confused by it. Firstly, this looks like an autoregressive model of order 1. From the looks of it, the φ coefficient ...
1 vote
35 views

### Confidence Intervals for More than One Variable?

Consider the univariate case, suppose we have some sample data on the heights of men and women - we are interested in estimating the average heights of men and women in the population, and the ...
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### Should I use Mean or Median? [duplicate]

I am analyzing a set of data (results) that does not follow Normal distribution or any known distribution. In this case, is it better to use (mean) or (median) to describe the result? Thanks
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### How to change a variable equation so that one quantity impacts the outcome more than it currently is?

Forgive my lack of vocabulary, I've never formally studied statistics. I'm currently working on a project involving quantifying genres of music, and there are only two variables at play: The Total ...
1 vote