1. atable::standardized_test_data
    A data.frame with standardized random data of various classes
    csv| xlsx| json| ndjson| rda| rds
    data.frame|1080 x 7
  2. atable::test_data
    A data.frame with random data of various classes
    csv| xlsx| json| ndjson| rda| rds
    data.frame|129 x 11