Aprincipal believes 50% of her music students reported their practice hours accurately. based on that assumption, she ran 200 simulations of random samples. she found the mean of each run. then she found the mean, 48%, and standard deviation of all the means, 18%, to create a normal distribution.

according to that distribution, which option below gives the best description of how likely is it that a single survey would return a mean of 30%?

extremely likely
likely
unlikely
extremely unlikely

step-by-step explanation: 4 cause 2+2=4

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: