Students in a statistics class are conducting a survey to estimate the mean number of hours each week that students at their college study. The students collect a random sample of 49 students. The mean of the sample is 12.2 hours. The standard deviation is 1.6 hours. What is the 95% confidence interval for the number of hours students in their college study? Group of answer choices (10.2 , 14.2) (12.0 , 12.4) (9.0 , 15.4) (11.7 , 12.7) No confidence interval can be constructed since the conditions for a T-interval are not met