Question 1179002
p1=237/5100=0.04647
p=200/4900=0.04081
p* (combined) is 437/10000=0.0437
two sample proportion test with large enough np and n(1-p)
Ho: p1 < = p2
Ha: p1 > p2
alpha=0.01 p{reject Ho|Ho true}
test is z, reject if z>2.33
z=(p1-p2)/sqrt (.0437*0.9563((1/5100)+(1/4900)); second part is 0.00409
z=0.00566/0.00409=1.38
Fail to reject Ho, and insufficient evidence to support claim there is an increase.
p-value=0.083