Aresearcher matched 30 participants on intelligence (hence 15 pairs of participants), and then compared differences in emotional responsiveness to two experimental stimuli between each pair. for this test, what are the critical values, assuming a two-tailed test at a 0.05 level of significance?

(a) ±2.042
(b) ±2.045
(c) ±2.131
(d) ±2.145

i found two solutions,   n = 2 • ± √3 = ± 3.4641

step-by-step explanation:

the image is given below

since the options are not given so we draw it from the equation

the given equation is

y = (x-1) (x+4)

y = y² + 3x - 4

the above equation is a quadratic equation which will have two roots. if we draw the graph for it, it will look like this

there were a lot of them but the first one to pop up on a google search was bts