Average most often refers to the arithmetic mean, but more generally to measures of central tendency that use most, or all, of the data values. Examples include trimmed mean, Winsorized mean, harmonic mean and geometric mean.

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2answers
23 views

Average/extreme value in distrubtion

If I have a distribution like the one below, is there a way to say to what degree a value is part of the distribution? e.g. if I am considering the value 4.122e-4, it clearly falls within the ...
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0answers
15 views

taking decisions: how to combine scores from different systems?

I have several completely different software components that are producing scores for certain candidate solutions. Now, setting aside the technical details of what is the problem that I want to solve ...
3
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1answer
67 views

If I have means and medians, is there a way to average them?

Please consider these data points as an example of many more, they represent single studies with multiple samples which have been done during the last decades. ...
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0answers
3 views

what is the difference between the ewma filter and mean filter

i have a sample and short question in which cases it is advantageous to use current and past informations such as ewma filter z=lamda*xi +(1-lamda)*xi-1 or to ...
2
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3answers
180 views

If I only have a range, is it acceptable to calculate an average out of it?

Supposed I have only this data point available: Concentration = (1.1 - 2.0 g/L). Is it acceptable to conclude : ...
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1answer
26 views

Normalization of a 360-degree feedback evaluation

First of, I'm not a data scientist or anything like that so there will be a lot of hand waving (sorry about that), I just hope to get the gist across. At my company we're doing a 360-degree feedback ...
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1answer
29 views

Keep multiple trials for each patient in analysis, or average across trials?

I have a sample of 10. Each patient completes a walking task twice. Is it reasonable to use both trials in my analysis? I get scale data. I see the patients at two different time points. To clarify. ...
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1answer
14 views

Calculating new averages

I'm studying for a midterm in my basic stats course and came across a question that I'm confused with how it's solved. A manager at a local gas bar has 13 staff members. The average hourly wage for ...
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1answer
10 views

Measuring average from a scale

I am not even sure my question makes sense but hoping one of you might see what I'm trying to achieve. I have a survey which has the following responses: Unhappy, neutral, happy I am not sure what ...
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2answers
79 views

Why does the variance decrease when averaging zero-mean gaussians?

I have the following in my textbook: $$ r_k \thicksim N(0,\sigma_r^2) \\ \Rightarrow \sum\limits_{k=1}^K r_k(t) \thicksim N(0,K\sigma_r^2) \\ \Rightarrow \frac1{K} \sum\limits_{k=1}^K r_k(t) ...
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0answers
11 views

Does monthly average inventory take into account items received?

I don't know if this is the right stack exchange board for this or not.. but here it goes.. I am calculating average inventory: ...
2
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1answer
30 views

What are some statistical principles that need to be applied to bucketing chart points by time?

I am taking the average of points by time range. There aren't an equal number of points per time bucket. Is this an acurate representation when simplifying/minimizing points on a line chart? i.e. ...
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0answers
15 views

How does micro precision work

I am trying to figure out how micro precision works and have followed some tutorials online. But some things don't make sense at all I copied the part of the text from a website online ...
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1answer
35 views

Is there an advantage to using moving average versus removing outliers?

I have a dataset and for each hour there is 3 readings (sometimes missing and sometimes clearly an outlier). I am trying to find the mean of the entire dataset for the parameter. It has been suggested ...
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2answers
47 views

averaging after n trials of monte carlo simulation or not? which is better statistically?

related to my job I want to code a realistic monte carlo simulation for availability, reliability and related sensitivity analysis. Scenario will be complex and there will be many parameters. What I ...
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1answer
46 views

Standard deviation of a casino's profit

For the following question, I've determined the mean to be \$0.20, but how do I determine the standard deviation? A slot machine at a casino pays out an average of \$0.9, with a standard ...
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1answer
32 views

Average precision when not all the relevant documents are found

I can't find on the Internet a proper source that explains this. I have built a search engine that for a particular query retrieves 5 relevant document out of the 10 relevant documents. When I ...
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0answers
21 views

average behavior of different data sets

I have $n=100$ different data sets, each of which are distributed as what it seems to be a power-law distribution with different exponents, i.e. $x^{-\gamma_{i}}$ for distribution $i$. What I am ...
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0answers
48 views

What is the proper way to calculate an average with two columns of data?

I saw a post on the internet about this a long time ago and can't seem to find that post again. The post talked about the proper way to calculate an average if the data was in two columns and the ...
2
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1answer
33 views

Representative transaction KPIs - what method to chose (average, median…) / how?

In my dataset i have about 30k of transactional data. For analysis, I want to show the end user some important KPIs: Average of transactions with loyalty cards Average turnover of these transactions ...
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0answers
51 views

Average individual correlations or perform 1 set of correlations

First of all thanks for your time reading this post. I got some issue with correlation analysis that I am not able to solve at all as for more people I ask, different opinions I get (including ...
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2answers
47 views

Comparing two populations [Beginner]

I have sampled from two separate populations, and I want to figure out which population is better. Population 1 has an average score of 84.1 and a standard deviation of 11.8. Population 2 has an ...
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1answer
44 views

Average of values, their standard deviations and ranges

After reading for hours, I am still swimming. I have a set of plasma concentration results from different labs: ...
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0answers
13 views

Is it advisable to average quarterly benefit claimants rate to an annual claimants rate, and if so how?

I had a discussion with colleague whether would it be sensible to average quarterly unemployment benefit rate to an annual rate? Is it better to refrain from averaging the quarterly ...
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0answers
10 views

Calculating daily mean for whole year through temporally varying samples

I have really basic statistical question about calculating the mean of two temporally different datasets. Let's say that we have two spatially and temporally varying datasets from the same measurment ...
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0answers
53 views

Panel data - industry average calculation in R

I have panel data with many observations of companies' financial indicators that could be grouped by year and industry. What should I do if I need to adjust each observation by the yearly industry ...
4
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3answers
617 views

Can percentages be averaged?

I've been sent two sets of timings for a task as carried out by several subjects: first using Method A, and the other using Method B. The experimenter has taken the mean timing for each method, ...
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1answer
174 views

How to determine if a weighted average is accurate?

I have the following problem. Consider that there is an election where n persons are voting. The goal of the election is to estimate the weight of a bag. Each person can vote for an integer value : ...
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0answers
13 views

About S/N and averaging

It is well known that Thus, in the ideal case S/N increases with the square root of the number of measurements that are averaged. (Wikipedia) The assumptions are that (1) signal and noise are ...
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0answers
37 views

ranking based of number of items and value

How to avoid the issue of an item with a single 5-star rating getting a higher average rating than one with (99 5-star ratings and one 4-star rating). How to properly rank based on average star and ...
0
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1answer
58 views

Finding an accurate average with the least number of samples

For the process I am testing, if I run 1000 trials I get an average score of 84.2 with a standard deviation of 11.35. So my question is, is it possible to run this less than 1000 times and still get ...
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1answer
18 views

Technical term for special case of averaging

The special case I'm considering is the following. Suppose that from a population of size n, we add together only the non-zero values. Now, to find the average, suppose we divide the sum of the ...
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1answer
63 views

How to calculate the average age of a subgroup

Just to confirm my findings to a group of data scientists... I have a data set with patients visits and among others the death age of deceased patients. If I then look up all diagnoses the patients ...
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1answer
56 views

SPSS ANOVA or MANOVA or huh?

Me again asking the silly questions - this might belong here as I've been told it may belong in a software section somewhere..? Which I have still been unable to find. Here is a screenshot of my ...
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1answer
1k views

SPSS - making percentage variables

I need to transform a fairly large data set in order to analyse a certain variable as a percentage. I have seconds that I want to convert to their percentage value but by grouping variables. ie. ...
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0answers
24 views

Why is my average CTR different from my overall CTR?

Here's some sample data: ...
4
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1answer
2k views

How to find average and median age from an aggregated frequency table

I am using excel and I am trying to find both the average age and median age. I have two columns. 1 for the category and the other for the number of people in each category. ...
9
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1answer
160 views

When would we use tantiles and the medial, rather than quantiles and the median?

I can't find definitions for either tantile or medial on Wikipedia or Wolfram Mathworld, but the following explanation is given in Bílková, D. and Mala, I. (2012), "Application of the L-moment method ...
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0answers
18 views

Calculating average fuel consumption with no complete data

Background I just answered a question about SQL on StackOverflow, but think there's a more important question about statistics which I'm unqualified to answer. The asker has 3 fields: f - Fuel ...
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6answers
690 views

Is the median a type of mean, for some generalization of “mean”?

The concept of "mean" roams far wider than the traditional arithmetic mean; does it stretch so far as to include the median? By analogy, $$ \text{raw data} \overset{\text{id}}{\longrightarrow} ...
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0answers
38 views

How do I correctly calculate the average and standard deviation of three samples with varying number of data points?

An example: I have three data sets, measured in triplicate: 1, 4, 3, 2, 4, 3 4, 5, 3, 6 6, 4, 3, 5, 7 I want to take the average and standard deviation of the ...
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0answers
33 views

Weighted mean: Inverse of individual values's confidence interval as weight?

This seems to be a very basic question, however I could not find a satisfactory answer throughout the web, yet. I have, say, N values, whose I know the N respectives 95% confidence intervals (said ...
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0answers
21 views

Standard deviaiton for mean of an already averaged data

I was wondering how to set the standard deviations for average of an already averaged data! The following example shows 2 countries, each with 3 districts. From each district samples (n) were ...
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0answers
7 views

OOV “frequency”

I'm writing an algorithm to split twitter hashtags into their component words. I'm splitting the tags into all possible substrings, and then looking up each substring's frequency in a dictionary. I ...
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1answer
50 views

combining subjective probability estimates and statistical estimates for forecasting

At the end of the year forecasters usually struggle year to predict landing estimate for the financial year due to variety of reasons including volatility, unreliable demand projections, inventory ...
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0answers
47 views

Stolen base success vs Independent catcher and average catcher

I would like to know if my thinking on this is correct. Note: This is not a homework or work question, I am just interested in learning about comparing averages and how it applies to the problem set ...
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2answers
44 views

Predict Seasonal Variations

I am developing an application related to pharmaceutical industry. Certain items are sold in significantly higher quantities during specific periods of the year. For example, here in my country, ...
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0answers
8 views

Average of a list of data using two characteristic

Problem: I want the "average demand of all resources" including priorities. Something like an average demand which still has a priority. What I have...so far: I know I could get an average of each ...
0
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3answers
61 views

Distribution of the average of a sample of standard deviations

I have a sample of standard deviations. How is its average distributed? The sample is not big so normality is hardly possible. A.B.
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1answer
55 views

Correlation Coefficient for 20-year Average

I have 20 years of corn yields data from five neighboring fields. I transform them into year over year yield increase. I want to get the correlation between these areas. But instead of correlation out ...