To determine the average number of hours of sleep of Algebra students, two confidence interval estimates were created using the SAME sample data: (6.53, 7.95) and (6.20, 8.28). One estimate is at the 90 percent level, and the other is at the 98 percent level. If both intervals were correctly calculated, which is which? A. (6.53, 7.95) is the 90 percent level.
B. (6.53, 7.95) is the 98 percent level.
C. This question cannot be answered without knowing the sample size.
D. This question cannot be answered without knowing the sample standard deviation.
E. This question cannot be answered without knowing both the sample size and standard deviation.