In a recent study examining the effects of sleep deprivation on cognitive performance, researchers collected data from two groups of participants: one group was allowed to sleep for 8 hours (control group), while the other group was only given 4 hours of sleep (experimental group). After the sleep session, participants were given a series of cognitive tests assessing memory, attention, and problem-solving skills.

The data was analyzed using various statistical methods, including means and standard deviations for each group, as well as t-tests to determine if the differences in cognitive performance were statistically significant.

Which of the following statements best interprets the implications of a statistically significant result found in the cognitive tests?