Subgroup Data Pooling [1]
Subgroup 1: Sample Size Mean Standard Deviation
Subgroup 2: Sample Size Mean Standard Deviation
Results: Combined Mean Combined Standard Deviation:

Reference:

[1] Mathias Harrer, Pim Cuijpers, Toshi A. Furukawa, David D. Ebert. 2022. Doing Meta-Analysis with R: A Hands-On Guide. ISBN:9780367610074