Chapter 10.4B, Problem 20A

In a school system, teachers start at a salary of $\$25,200$ and have a top salary of $\$51,800$. The teachers’ union is bargaining with the school district for next year’s salary increment.

a. If every teacher is given a $\$1000$ raise, what happens to each of the following?

i. Mean

ii. Median

iii. Extremes

iv. Quartiles

v. Standard deviation

vi. IQR

b. If every teacher received a $5\%$ raise, what does this do to the following?

i. Mean

ii. Standard deviation