You want to estimate the number of eighth-grade students in your school who find it relaxing to listen to music. You consider two samples. Which sample is unbiased?

fifteen randomly selected members of the band

every fifth student whose name appears on an alphabetical list of eighth-grade students
Question 2
Explain.

You want to estimate the number of twelfth-grade students in a high school who ride a bus to school. Which sample is unbiased?

A. 4 students in the hallway

B. all students on the soccer team

C. 50 twelfth-grade students at random

D. 100 students at random during lunch

explain

the correct answer to your question is a. 4^4

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guess at question:

a vertical line intersects the graph of g(x,y) = 0 at two points. what conclusion follows about the function f(x) implicitly defined by g(x,f(x)) = 0?

the domain of f(x) cannot include the x coordinate of any such vertical line.

informally, f(x) is not a function, and

g(x,y)=0 cannot be solved for y uniquely.

the relation r = {(x,y) such that g(x,y) = 0} is a function if

for all (a,b) ∊ r and (c,d) ∊ r, a=c implies b=d.

step-by-step explanation: