Aresearcher wishes to compare how students at two different schools perform on a math test. he randomly selects 40 students form each of the schools and obtains their test scores. he pairs the first score from school a with the first score from school b, the second score from school a with the second score from school b and so on. he then performs a hypothesis test for matched pairs.

a.) is this approach valid? why or why not

b.) if it is not a valid approach, how should the researcher have proceeded?

option a.

step-by-step explanation:

if you look closely at the graph, we can notice that the function is not defined at two different points.

if you look at functions b and c, you will notice that both functions are not defined at just one point. the function b is not defined at x= -5/2 and function c is not defined at x=-5. both options are discarded, given that our function should not be defined at two fiferent points.

now, if you look closely at the graph you will notice that the function sketched is not defined at x=5 and x=-2.

d

step-by-step explanation:

idk

step-by-step explanation:

step-by-step explanation:

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