Teacher raises A school system employs teachers at salaries between $28,000 and $60,000

QUESTION:

Teacher raises A school system employs teachers at salaries between $28,000 and $60,000. The teachers union and the school board are negotiating the form of next years increase in the salary schedule. (a) If every teacher is given a flat $1000 raise, what will this do to the mean salary? To the median salary? Explain your answers. (b) What would a flat $1000 raise do to the extremes and quartiles of the salary distribution? To the standard deviation of teachers salaries? Explain your answers.