All but one of the following statements pertaining to the standard deviation of a distribution is false. Select the option that is accurate. A dataset with the following observations (5, 7, 9, 11) will have the same standard deviation as a distribution with observations (4, 6, 8, 10). A dataset with the following observations (3, 5, 7, 9) would be unaffected were the following observations (1, 11) added to the distribution When calculating population standard deviation, you lose one degrees of freedom because knowing n-1 of the deviations determines the last deviation A distribution with a standard deviation of 47.5 would be described as more variable than a distribution with a standard deviation of 49

Mrs. julien’s and mrs. castillejo’s classes are selling cookie dough for a school fundraiser. customers can buy packages of macadamia nut chip cookie dough and packages of triple chocolate cookie dough. mrs. julien’s class sold 25 packages of macadamia nut chip cookie dough and 30 packages of triple chocolate cookie dough for a total of $221.25. mrs. castillejo’s class sold 5 packages of macadamia nut chip cookie dough and 45 packages of triple chocolate cookie dough for a total of $191.25. (a) write the system of equations that model the problem. be sure to explain which equation represents which situation. (b) find the cost of each type of cookie. show your work. (c) explain which method you used to solve the system and why you chose that method.