A nutritionist wants to estimate the average caloric content of the burritos at a popular restaurant. They obtain a random sample of 16 burritos and measure their caloric content. The sample mean and sample standard deviation of measured caloric contents of the 16 burritos are 700 calories and 50 calories, respectively. Suppose the caloric content of burritos is normally distributed. Based on the sample, which of the following is a 95% upper confidence bound for the mean caloric content of these burritos? A. less or equal than 700 plus t subscript 0.05 comma 15 end subscript cross times 50 over 4
B. less or equal than 700 plus t subscript 0.025 comma 15 end subscript cross times 50 over 4
C. less or equal than 700 plus Z subscript 0.05 end subscript cross times 50 over 4
D. less or equal than 700 plus t subscript 0.025 comma 16 end subscript cross times 50 over 4