A school system employs teachers at salaries between $38,000 and $70,000. The teachers’ union and school board are negotiating the form of next year’s increase in the salary schedule. Suppose that every teacher is given a $1000 raise. What effect will this raise have on each of the following characteristics of the resulting distribution of salary?

a. Shape

b. Mean and median

c. Standard deviation and interquartile range (IQR)