Write the Word or Phrase That Best Completes Each Statement $\frac { \bar { x } - 71 } { 11 / \sqrt { 35 } }$

Essay

Write the word or phrase that best completes each statement or answers the question.
-Scores on a test are normally distributed with a mean of 71 and a standard deviation of 11. For samples of size 35, which of the two variables below has more variation? Why? What is the distribution of each of the variables?
(a) $\frac { \bar { x } - 71 } { 11 / \sqrt { 35 } }$

(b) $\frac { \bar { x } - 71 } { s / \sqrt { 35 } }$