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A dataset containing sample size and number of effect sizes seen in primary studies evaluated by the What Works Clearinghouse.

Usage

wwc_es

Format

A tibble with 615 rows and 2 variables:

n

the sample size of the primary study

n_ES

number of effect sizes in the primary study

References

What Works Clearinghouse (2021). “Data from individual studies.” https://ies.ed.gov/ncee/wwc/studyfindings. (visited on ).