One sample has a mean of M = 6 and a second sample has a mean of M = 12. The two samples are combined into a single set of scores. a. What is the mean for the combined set if both of the original...

One sample has a mean of M = 6 and a second sample has a mean of M = 12. The two samples are combined into a single set of scores. a. What is the mean for the combined set if both of the original samples have n = 4 scores? b. What is the mean for the combined set if the first sample has n = 3 and the second sample has n = 6? c. What is the mean for the combined set if the first sample has n = 6 and the second sample has n = 3?