Question 915811
Ho: p ≤  0.2
Ha: p > 0.2 (claim)
test stat: z = 1.50
.05 significance level, one-tailed
critical value = z = invNorm(.95) = 1.645
P(z > 1.645)...(area under the standard normal curve to the right of blue line represents the critical area)
1.50 < 1.645, accept Ho, (test results do not support claim)
{{{drawing(400,200,-5,5,-.5,1.5, graph(400,200,-5,5,-.5,1.5, 0,exp(-x^2/2)), blue(line( 1.645,0, 1.645,exp(-1.645^2/2))),locate(4.8,-.01,z),locate(4.8,.2,z),locate(.4,-.02,.8))}}}