12) A manager of the credit department for an oil company would like to determine whether the mean monthly balance of credit card holders is equal to $75. An auditor selects a random sample of 100 accounts and nds that the mean owed is $83.40 with a sample standard deviation of $23.65. If you wanted to test whether the mean balance is different from $75 and decided to reject the null hypothesis, what conclusion could you reach? 12) A) There is not evidence that the mean balance is not $75. B) There is evidence that the mean balance is $75. C) There is not evidence that the mean balance is $75. D) There is evidence that the mean balance is not $75