4.1

1.) An instructor has graded27exam papers submitted by students in a class of28students, and the average so far is71. How high would the score on the last paper have to be to raise the class average by 1 point? By 2 points?

2.) A sample consisting of four pieces of luggage was selected from among the luggage checked at an airline counter, yielding the following data onx= weight

(in pounds).

x₁=33.6,x₂=27.2,x₃=36.1,x₄=30.7

Suppose that one more piece is selected and denote its weight byx₅.

Find all possible values ofx₅

such thatx= sample median.

(Enter your answers as a comma-separated list.)

x₅=