Calculating mean values based on two different groupings in a data frame
132574
Get the means of sub groups of means in R
100214
Group by multiple columns in dplyr, using string vector input
151672
Summing values if same second column value
12697
Clustering of mixed type data with R
109959
Calculate mean of ordinal variable
149518
Adding counts of a factor to a dataframe
154782
ANOVA analysis with only mean and standard deviation
66901
How to calculate the confidence interval of the mean of means?
33206
Derivation of Mode of grouped data
147616
How to calculate mean and standard deviation in R given confidence interval and a normal or gamma distribution?
79634
find the min and max value in two columns
103595
Pandas group by operations on a data frame
12545
Calculate first difference by group in R
81170
How to replace NA with mean by group / subset?
7274
Calculate group mean (or other summary stats) and assign to original data
135907
Area within a given number of standard deviations from given mean
100371
Creating a histogram using aggregated data