True or false? the sum of the differences must be zero for any distribution consisting of n observations?

Evaluate-27 ^4/3/8 a) - 81/16 b) 81/16 c) 16/81

Anumber cube is rolled two times in a row. find the probability it will land on 2 on the first roll and a number greater then 4 on the second roll

Question 9 of 10 2 points suppose your sat score is 1770. you look up the average sat scores for students admitted to your preferred colleges and find the list of scores below. based on your sat score of 1770, which average score below represents the college that would be your best option? o a. 1790 o b. 2130 o c. 2210 od. 1350