statistics

For which type of correlation, does one variable decrease while the other variable increases? O A) positive O Cannot be determined O no linear correlation O B) negative Question 11 2.5 pts A sample of nine students was selected from among the students taking a particular exum. The nine students were asked how much time (in hours) they had spent studying for the exam and the responses were as follows: 18, 7, 10, 13. 12, 16, 5. 20, 21 Estimate the mean study time of all students taking the exam. Round if tenth of an hour if necessary A) 13 hours B) 12.2 hours C) 13.6 hours D) It is not possible to estimate the population mean from this sample data O B OC O A OD