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Questions tagged [stdev]

Returns the statistical standard deviation of all values in the specified expression.

STDEV is used when the group of numbers being evaluated are only a partial sampling of the whole population. The denominator for dividing the sum of squared deviations is N-1, where N is the number of observations (a count of items in the data set). Technically, subtracting the 1 is referred to as "non-biased.

https://msdn.microsoft.com/en-us/library/ms190474.aspx

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SQL Query: select only numbers from a list of string values

I need to create a query in an sqlite database using DB Browser. The columns are: state, measure_id, measure_name, score. All of the data has been input as strings. I can cast the score strings as decimal, however the problem is that some of the…
zsad512
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Calculate Lowest Ave and STDEV from N-1 Sample

I need help coding a function in python for calculating average and standard deviation from N-1 samples. I have 96 rows of quarduplicate samples: total of 384 samples in 96x4 numpy arrays. For each row, I would like to: Take out one sample in…
Vincent
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How to exclude null values from column group to calculate StDev in SSRS?

I have to calculate StDev for my column groups. The problem is that it take in calculations null values. I use this: =IIF(Fields!estNumerique.Value = 0, "n/a",Replace( Format( StDev( cDec( Replace( IIF(Fields!estNumerique.Value = 0, nothing,…
Maria Tacu
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Standard deviation of combinations of dices

I am trying to find stdev for a sequence of numbers that were extracted from combinations of dice (30) that sum up to 120. I am very new to Python, so this code makes the console freeze because the numbers are endless and I am not sure how to fit…
Lema
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Crystal Reports 13 Standard Deviation with formula fields

I've been working on a report made by someone else which uses the StDev function. I thought it would be simple enough, but the data can contain multiple values for each record, so there are if statements used to determine which value to take from…
recordmgmtnoob
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How to write a macro to do standard deviation on a column of data just before a blank row?

enter image description here I have managed to work out the mean by writing this macro 'This works out how many rows (another way) Dim AV As Long, AVC As Long AV = Range("O" & Rows.Count).End(xlUp).Row AVC = AV - 1 ' This adds up all the data…
Gary
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Standard Deviation every n rows in R

So I am an R code beginner. It seems to me that there is a quick and dirty way to calculate the mean of a set of n rows within a column, but is there something similar for standard deviation (or standard error)? I'd like to avoid looping if possible…
Plantapus
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STDEV to measure movie ratings

I'm looking at movie ratings across a friend group and I'm trying to find the best way to measure how people rate movies compared to IMDb ratings. Here you can see my table titled fRating, which is a fact table that contains the MovieID, the…
Walker
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Creating custom standard deviation bars in VBA from Access

I'm trying to include custom standard deviation bars in a chart using VBA, but I keep getting a run time error 13 "type mismatch" in the line that actually adds the bars. I believe it has a problem with my range object (rngStD), but I don't know…
andruemily
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Standard deviation with groupby(multiple columns) Pandas

I am working with data from the California Air Resources Board. site,monitor,date,start_hour,value,variable,units,quality,prelim,name 5407,t,2014-01-01,0,3.00,PM25HR,Micrograms/Cubic Meter ( ug/m3 ),0,y,Bombay Beach…
obscuredbyclouds
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Calculate Mean and Standard Deviation Using R

New to R. I'm trying to calculate the mean of double plays hit into for each batter using a data set from 2006 - 2016. But the code is flawed and I'm not sure why. The Rate1 is the same for each batter. Once I get Rate1 for each batter I want an…
bbgoldm
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ISNULL() for calculated column in Full Join. SQL Server

I'm currently facing a problem when calculating the standard deviation in an SQL Server statement. My problem: I have two tables. T1: Reg_Month --------- 1 2 3 ... T2: Product Month Consumption ------------------------------- ProdA 1 …
user4985694
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Calculate standard deviation only on values between x and y

i have a range of data in column a called mycol. Some values are clearly errors (ie, less than 0 or over 100000. If I don't omit those values the stdev is highly skewed. Therefore I want to calculate the stdev only on the values >0 and < 100000. Can…
Jeff Johnson
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sql AVARAGE OF STDEV

I want the result of the avarage of the STDEV of a period of days. What is wrong on my code? select avg(X_MESURE) AS AVG_MESURE from (SELECT cast(DATE_PEREMPTION as date) as DATE_PEREMPTION, ROUND(STDEV(MESURE),3) AS X_MESURE FROM…
Colatra93
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Why do the R functions mean() and sum() behave differently with vectors vs. raw strings?

I was wondering if there was an underlying programming logic as to why some basic R functions behave differently towards raw data input into them vs. vectors. For example, if I do this mean(1,2,3) I don't get the correct answer, and don't get an…
N Brouwer
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