Final answer:
The correct answer is C) 60%, which signifies that 60% of the norm group scored at or below a raw score of 50.
Step-by-step explanation:
If someone gets a raw score of 50 and this equates to a percentile rank of 60, it means that 60% of the norm group scored at or below that score. Thus, the correct answer to the question 'What percent of the norm group scored 50 or less?' is C) 60%.
Percentile ranks are used to compare scores in a way that accounts for the variation in the different test scores. A percentile rank of 60 means that the individual has scored more than 60% of the norm group. Therefore, if one was seeking the 70th percentile, it would indicate that 70% of the test scores fall at or below that particular score.
In the context of standardized testing and scores, understanding percentile ranks is crucial for gauging where one stands in comparison to the norm group. For example, on a 20-question math test, if the 70th percentile for the number of correct answers was 16, it would mean that 70% of students answered 16 or fewer questions correctly.