Question 629557
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Hi,
Note: critical values: z0 = 1.88 and &#8722;z0 = &#8722;1.88 plotted on the Standard NOrmal curve below
{{{drawing(400,200,-5,5,-.5,1.5, graph(400,200,-5,5,-.5,1.5, exp(-x^2/2)), green(line(1.88,0,1.88,exp(-1.88^2/2)),line(-1.88,0,-1.88,exp(-1.88^2/2))),locate(4.8,-.01,z),locate(4.8,.2,z))}}}
If the test statistic lies beyond these either to the right or left, the
null hypothesis is rejected.
(a)z = 1.72 does not lie beyond to the right
(b)z = &#8722;2.03  lies beyond to the left