Question 1129582
Ho: p=0.505 or greater
Ha: p<0.505
alpha=0.10
one sample proportion
critical value |z|>1.645
z=(p hat-p)/sqrt(.505*.495/861); sqrt term=0.0170
p hat=0.499
z=-0.006/0.170
z=-0.35
fail to reject; insufficient evidence to conclude true proportion is < 0.505.