26. Calculate each value requested for the following set ofscores.
a. ?X X Y
b. ?Y 1 6
c. ?X?Y 3 0
d. ?XY 0 –2
2 –4
27. Use summation notation to express each of the followingcalculations. a. Add 3 points to each score, then find the sum ofthe resulting values. b. Find the sum of the scores, then add 10points to the total. c. Subtract 1 point from each score, thensquare each of the resulting values. Next, find the sum of thesquared numbers. Finally, add 5 points to this sum.
28. Describe the relationships between a sample, a population, astatistic and a parameter.
