Excel is a commercial spreadsheet program created by Microsoft.

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19 views

how to create subsets into new data sets using R programming? [closed]

I am currently using R programming language. I have a question on how to create subsets into new data sets (in the form of downloadable excels) from 1 big data set. For example : I have a big data ...
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5 views

how to automatically extract subset from one big set based on different criteria to produce different data frame in the end [closed]

I am currently using R. My purpose here to day is to find out how to automatically extract subset from 1 big set of data based on different criteria to get different excel sheet at the end based on ...
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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
34 views

Expected Value clarifications using R/Excel

So it has been a little while since I've taken my last statistics course, and I wanted to double check that I am not making any kind of grave errors in my expected value calculations. Quick bit of ...
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0answers
18 views

Sample Size Formula for Wilson Score, Clopper Pearson, and Jeffrey's

I am interested in finding the sample size formulas for proportions using the Wilson Score, Clopper Pearson, and Jeffrey's methods to compare with the Wald method. Also if anyone has code to replicate ...
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25 views

How to represent a three variable formula in Excel?

I am using Excel, and I would like to visualize or in some way examine and display in as simple a way as possible how a three variable formula changes by manipulating each variable. The formula can be:...
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5 views

How to create stacked bars with timeline in Excel? [migrated]

I want to make timeline in Excel with stacked bars so that each stack within a single bar corresponds to a given time period. As such, instead of having separate bars for all the categories, I want ...
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23 views

Excel Realstats MANN_EXACT function

I'm trying to compute some mann-whitney tests on my datas, and I use the really handy "Realstats". As you can see on this link, there are several functions available. As a noob in stats, I used the ...
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1answer
11 views

exporting from R objects of class “gts” “hts” [closed]

I am trying to save my forecast of class "gts" "hts" from R into excel but I get an error in R - "cannot coerce class "c("gts", "hts")" to a data.frame". Thank you, Despina
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1answer
22 views

Confidence Interval for Regression Line (simple linear regression)

So I've constructed a confidence interval for my regression line. However, because I have 2500 data points it is a very, very narrow interval (I can barely see it next to the regression line when I ...
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27 views

How to determine if a set of data is Student-t distributed

So I know how to use goodness of fit tests generally. For example if I wanted to check whether my data came from a Poisson distribution I would first estimate the parameter using MLE (so just the ...
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68 views

How can I have the sigma of a normal distribution when I have f(μ)?

How can I find the standard deviation $\sigma$ of a normal distribution satisfying the following criteria? \begin{align} μ &= 12 \\ f(μ) &= 0.5 \end{align} Basically, I have the mean $μ$ and ...
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18 views

Service Level Caluclation with Double Truncated Normal Distribution

The purpose of this exercise is to determine how the number of employees working affects the service level of their job within the organization they are a part of. EX. A call center gets 100 calls a ...
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22 views

Coefficient of correlation from averaged and not averaged data

I want to understand why I get two different results for $r^2$ from the data I post. I use the linest function in Excel. One more noob question about weighted ...
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0answers
14 views

Displaying two sets of data with unequal number of data points in Excel

I have two sets of data to display in a single chart using Excel 2010. First set is the exchange rates over time for GBP against the USD and EUR - this has daily plots so I have about 7300 ...
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0answers
13 views

How to calculate the weighted standard deviation [duplicate]

I have found many equations which claim to be for weighted standard deviation, yet all of these differ very slightly, and I am confused as to which is the correct one. I have some data in Excel, and ...
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0answers
46 views

Multiple Correspondence Analysis [closed]

I have a problem I can’t find a way to solve, even though I think it’s possible. I have an Excel file with some data related to patients. The patients have a certain diagnosis [coded as a number (1, ...
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28 views

Ran a logistic regression and fit my data to the predicted model but the predicted model is not overlapping the observed data

EXPERIMENT: Heaviness judgments of a variable weight to a standard weight (2000g). Independent variable/covariate: Weight (9 levels: 1920g, 1940g, 1960g, ... , 2060g, 2080g) Dependent variable: ...
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45 views

Translate R lm poly output to Excel equation?

I have the results of a lm model and its a so-so fit but now I have to dump it into an Excel file to do predictions. Most of it I get but the POLY factors I don't understand and where there is data it ...
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1answer
38 views

Calculating relative growth rate in R or excel [closed]

I'm currently trying to work out the relative growth rate of individuals using the equation RGR = (lnW2-lnW1)/(t2-t1) so log of weight at time 2 minus log weight at time 1 divided by time 2-time 1. ...
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0answers
39 views

What program to use for data presentation? [closed]

I need to plot few graphs for my dissertation, I would use GraphPad Prism however my 30 trial has expired and I cannot afford to buy it. R- sounds good but it is far too complicated and I, ...
2
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1answer
145 views

Statistical analysis of relational database: is it possible and how?

I have been struggling with flat file databases and corresponding statistical packages for almost 20 years now (from Excel to SPSS, then Stata, and currently R). However, I have always had to convert ...
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1answer
47 views

What does subscript i mean in statistics in this context (table with values included)?

This has been driving me nuts for hours. I cannot find information anywhere on the internet on what the formulas in the upper-right two cells mean. The i subscript is throwing me off.
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11 views

Calculating trends and averages on skewed data?

I'm running analysis on an Audit that has been distributed over the course of a year. There are currently about 40 or so different audits. Each audit contains 90 questions. When the audit was first ...
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15 views

Multiple regression: forcing y-intercept=0 improves R^2, is this correct/possible? [duplicate]

I have been running multiple regressions in Excel successfully (using the Data Analysis Toolpak) but when I run the same regressions and force the y-intercept through 0, the R^2 values are very ...
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22 views

analysing 7 point likert scale data

I do not have any background in statistics. however, I am conducting research for my thesis. I have gathered 32 data (initially) and I need to present primary data to my professor, I am using Excel to ...
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38 views

Paper on Excel problem

This might be a rather esoteric question, but .... I once encountered a paper / technical report that showed that Excel (up to some version) was using a numerically non-stable method to compute ...
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50 views

How can I calculate and display deviation from a linear trendline?

I am working in excel, and I have plotted some data in a scatter plot. I added a linear trendline, and I want to calculate the deviation of each data point from the trendline. I am plotting allometric ...
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20 views

Smaller p-values on a selective multiple regression analysis [duplicate]

When I run a multiple regression analysis in Excel on 20 independent variables and 1 dependent variable (in two goes), I obtain in the summary a set of p-values. When I select the (six) ones that are ...
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2answers
49 views

How to calculate Standard error of Normal Distribution with given Confidence Intervale

I have one basic question in preforming the forecast of fertility rate. I assumed if the fertility rate (is normally distributed) is equal to 3.0, there is an 80 per cent chance that fertility would ...
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53 views

What kind of distribution is my QQ-plot and histogram?

I am pretty in new in distribution issues and I am trying to figure out what kind of distribution I have. I have a historical data with more than 300 observations. I will calculate Value-at-Risk (VaR)...
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1answer
97 views

How can I transfer an ARMAX model in Excel in order to forecast future values?

I am currently trying to set up an Excel based tool, that alows to predict future values based on an ARMAX model, previously set up in SPSS. The Excel tool contains the coeffienients, calculated by ...
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49 views

Implementation of Naive Bayes Classifier in Excel?

I need help for implementation of Naive Bayes algorithm purely in Microsoft excel. I have 5 independent variable. I have already implemented in R but I would like to know is there any way to implement ...
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1answer
87 views

Statistical Analysis: Fisher exact test or chi-square test?

I am trying to do statistical analysis for a user survey. The total number of survey to be analysed is 59. The variables in the survey can be defined as a categorical variable. Some of the ...
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14 views

Ignore data where the minutes modulo five are not equal to zero

I've some data that I'll analyse. Every five minutes there was taken the power (P) of solar panels over five years. I've calculate the kilo watt hour of that moment by this formule: $$P[Wh] = P[W] ⋅ ...
2
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1answer
42 views

Calculating actual quantile from poorly defined lognormal distributions

I have a dataset in which the uncertainties in various parameters are modelled with a lognormal distribution. After the experiment I get a single number result. As part of a lookback to understand how ...
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1answer
105 views

R forecast ets initial level and trend

I am trying to understand how the ets function of R in the forecast package computes initial level $l_0$, and initial trend $b_0$. I was under the impression that they are set to the intercept and ...
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401 views

How to inverse loss function L(z) to normal standard distribution (z) [closed]

z is the standard normal distribution F(z) is the probability normal distribution L(z) is the standard loss function I can find these values using below code ...
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0answers
35 views

Predictive model building across seasons (time, year)

I'm using Excel - and yes that's very basic but have to start there. My hypothesis is that you can predict amount of people getting the flu by looking at social data. I have two datasets: - Social ...
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1answer
63 views

What test should I use to explain a natural phenomenon in three variables?

I have hundreds of sample points where I have data of three variables ranging from 0.0 to 1.0. I would like to use some statistical test to find a function that could predict a phenomenon. I also have ...
2
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3answers
317 views

Alternative visualizations to 3D bar chart

I have a dataset that consists of a numerical variable (height, y-axis). Each data point is replicated for an individual (1,2,3) in each treatment (A,B,C,D). Here is a terrible figure that I am ...
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0answers
17 views

Multiple regressions with same dependent variables

I was recently working on some problems dealing with regression, anova, and the like and in these problems there were 10 regression tables. 5 of which each had different dependent variables. 5 which ...
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1answer
70 views

Variables Importance to Predicted Value

I'm working on a model to understand the predictors (variables) importance, and whether going forward I should include them in the model which should scale over > 1M rows. Here is a sample of my data:...
2
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1answer
31 views

Standardized coefficients to zero mean

I was reading in the literature that in order to compare linear regression results with independent variables & categorical (variables), it is recommended to standardize the coefficients to a zero ...
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0answers
18 views

Validating poissonic (mutation) data using 95% confidence interval

I've been tasked with the following: We want to verify the quality of DNA sequences from a lab without redoing the assembly ourselves. These "query" sequences (say influenza) from the other lab are ...
3
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2answers
116 views

What kind of chart can visualize individual points of data on a single axis?

My core problem is trying to visualize the workload of a customer support team throughout the week. Specifically, I want to see what the load looks like hour by hour on each day for each agent ...
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1answer
27 views

Remove the effect of a variable from output

How do I remove the effect of a variable from the output? Say we have a stock market index, I want to know how the index would look if you take away one of the variables. I will have run a regression ...