Final answer:
Sleep deprivation can have a negative impact on academic performance, but it is a complex relationship influenced by various factors.
Step-by-step explanation:
The statement 'There is an association between sleep deprivation and poor grades' can be partially agreed upon. There is evidence to suggest that lack of sleep can result in decreased mental alertness and cognitive function, which can have a negative impact on academic performance. However, it is important to note that the relationship between sleep deprivation and poor grades is complex and can be influenced by various factors.