Good Evening,

Can you please help explain the formula. I think i may be missing a step. Thank you

Last year, television station WXYZ's share ofthe 11 PM. news audience was approximately equal to, but no greater than, 25 percent. The station's management believes that the current audience share is higher than last year's 25 percent share. In an attempt to substantiate this belief, the station surveyed a random sample of 400 1' PM. news viewers and found that 146 watched WXYZ. (a) Let p be the current proportion ofall 11 PM. news viewers who watch WXYZ. Set up the null and alternative hypotheses needed to attempt to provide evidence supporting the claim that the current audience share for WXYZ is higher than last year's 25 percent share. HO: p versus Ha: p I l