Answer:
group mean
Explanation:
Group mean is the mean of grouped data. Grouped data are data formed by the summation of individual observations of a variable into groups, so that a frequency distribution of these groups makes it easy to summarize or analyze data.
The group data of the sales of ice cream on hot days is different for those on cold days. assuming you took a range of data for each for three months. you would be able to compare results after collecting the mean of each group of data collected
