We can look at the first 10 and the last 10 rows of the dataset with: (I copy the dataset into dat, which is a bit shorter and therefore easier to type further below). (2004) on the effectiveness of school-based writing-to-learn interventions on academic achievement ( help(dat.bangertdrowns2004) provides a bit more background on this dataset). For the example, I will use data from the meta-analysis by Bangert-Drowns et al.
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