Americans sleep an average of 6.8 hours a night. A sample of 35 college students found that on average, these students sleep 6.5 hours a night. A hypothesis test looking into whether the mean among students is different from the mean in the population found a p-value of 0.003. What would be a plausible 95% confidence interval for the average number of hours students sleep at night? O (6.3, 6.6) O (6.4, 6.6) O (6.2, 6.9) (6.1, 6.9)