In a clinicaltrial, 22

22 out of 857

857 patients taking a prescription drug daily complained of flulike symptoms. Suppose that it is known that 2.3

2.3% of patients taking competing drugs complain of flulike symptoms. Is there sufficient evidence to conclude that more than 2.3

2.3% of thisdrug's users experience flulike symptoms as a side effect at the alpha equals 0.05

=0.05 level ofsignificance?

Because np0(1-p0)= ?