translate English to French: The estimated difficulty of the sit-ups task was −2.80, which was appropriate for a majority of examinees whose ability levels ranged from.09 to 1.39.
Le niveau estimé de difficulté des redressements assis est de −2,80 et convient à la majorité des sujets dont le niveau d'habileté varie de 0,09 à 1,39.