Consider a population consisting of the number of teachers per college at small 2-year colleges. suppose that the number of teachers per college has an average μ = 150 and a standard deviation σ = 20.

a. use chebyshev's rule to make a statement about the minimum percentage of colleges that have between 90 and 210 teachers. (round your answer to two decimal places if necessary.)

(b) assume that the population is mound-shaped symmetrical. what proportion of colleges have less than 170 teachers?