The lowest value in a set of ordered scores is x and the highest value is y. If each score is increased by k, then which of the following must be true of the revised set of scores?
I. The mean is increased by k.
II. The range is k.
III.The median remains unchanged.

the arithmetic mean of a set of 20 test scores is represented by x. If each scores is increased by y points, which expression represents the arithmetic mean of the revised set of test scores?

The mean of a finite set S of numbers is 14, the median of this set of numbers is 12, and the standard deviation is 1.8. A new set T is formed by multiplying each member of the set S by 3. Which of the following statements must be true of the set T ? I. The mean of the numbers in set T is 42. II. The median of the numbers in set T is 36. III. The standard deviation of the numbers in set T is 5.4.

If the range of a set of integers is 2 and the mean is 50, which of the following statements must be true? I. The mode is 50. II. The median is 50. III. There are exactly three data value.

In the figure above, lines k, A , and m intersect at a point. If x+y = u+w , which of the following must be true? I. x=z II. Y=w iii. Z=t

Which arrangement of the following set of atoms is in order of increasing atomic radius: Na, Rb, K and Mg ,

Which arrangement of the following set of atoms is in order of increasing atomic radius: Na, Rb, K and Mg ,

Which arrangement of the following set of atoms is in order of increasing atomic radius: Na, Rb, K and Mg ,

Write the set of values of k for which f(x)=k x-sinx is increasing on R .

Write the set of values of k for which f(x)=kx-sin x is increasing on R .