Questions tagged [analysis-of-means]

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Comparing means in bins of different sample sizes

Suppose I have the following 2 plots showing the mean of a variable on a 2-d spatial grid, as well as the occurrence histogram (see bottom). Is there a specific way to compare these means, even ...
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1answer
55 views

How to compare means among groups with a single value?

My aim is to compare means among different groups, but I only have one single value (mean) for each group. I also have the total number of individuals per group. I don't have data for all individuals ...
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942 views

T-test, ANOVA or Regression, what's the difference?

I know this question has been asked in similar ways already, but cannot find a suitable answer to understand it. I have three subsamples defined on programme participation (participants, drop-out, and ...
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8 views

Differences in means of raster files

I am analysing long-term data on a raster. I group this data in three parts depending on a factor value. Now, I am taking means in each group pixel by pixel and would like to detect pixels on the map ...
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1answer
126 views

Which test does the lsmeans package use to compare the means in pairwise tests and what are its assumptions?

I'm currently using lsmeans to compare the means of various groups using the contrast argument. I'm using data that follows a Gaussian distribution. Would an unbalanced data structure affect the rate ...
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42 views

Calculating if there's a significant difference between the difference of two sets of groups

I measured the speeds snails fell off in a high-speed aquarium, where current was created by me opening a valve to different degrees, leading to the speeds that snails could fall-off at being set and ...
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1answer
59 views

Proper statistical analysis to compare means from three groups with two treatment each

any help to solve this is greatly appreciated: The research question is to assess the superiority of Treatment A for estimulate bone growth in comparison with Treatment B, the current standard. I'...
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1answer
41 views

Comparing two means from one person at one time date

A short shot of help would be great!! Thanks a lot in advance. I have asked same probands to rate two groups of people, e.g. unemployed indivduals versus employed individuals with parallel formulated ...
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2answers
29 views

Compare multiple means and finding which one is the biggest and which one is the smallest

Is there a statistical test I can apply to compare multiple rates and get which one is the biggest and which one is the smallest? Example: 1 person converted out of 2 for page A. conversion 1/2 10 ...
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1answer
176 views

Equicorrelation of deviations from a grand mean

In the following article: Nelson, L. S. "EXACT CRITICAL-VALUES FOR USE WITH THE ANALYSIS OF MEANS." Journal of Quality Technology 15.1 (1983): 40-44. Nelson states that "When ANOM [Analysis of Means]...