In a random sample of 60 dog owners enrolled in obedience training, it was determined that the mean amount of money spent per owner was $109.33 per class and the standard deviation of the amount spent per owner was $12. Construct and interpret a 95% confidence interval for the mean amount spent per owner for an obedience class. Round to the nearest cent. OA. Lower bound: $106.23; Upper bound: $112.43. We are 95% confident that the mean amount spent per dog owner for a single obedience class is between $106.23 and $112.43. OB. Lower bound: $106.29; Upper bound: $112.37. We are 95% confident that the mean amount spent per dog owner for a single obedience class is between $106.29 and $112.37. OC. Lower bound: $106.78; Upper bound: $111.88. We are 95% confident that the mean amount spent per dog owner for a single obedience class is between $106.78 and $111.88. D. Lower bound: $106.74: Upper bound: $111.92. We are 95% confident that the mean amount spent per doa