1) Find n for a 98% confidence interval for p with E = 0.018 using an estimate of p = 0.4.

(Round up to the nearest whole number.) ____________________

2) A politician claims that she will receive at least 59% of the vote in an upcoming election. The results of a properly designed random sample of 100 voters showed that 56 of those sampled will vote for her. Is it likely that her assertion is correct at the 0.05 level of significance?

Find z ____________________ Find P-value________

3) Can you help me know why these are wrong, my answers are in bold

(a) Calculate the test statisticzused in testingH_o:p= 0.70,H_a:p> 0.70; with the samplen=315andx=259. = 4.65 (b) Calculate the test statisticzused in testingH_o:p= 0.50,H_a:p< 0.50; with the samplen=469andx=207. = -2.60 (c) Calculate the test statisticzused in testingH_o:p= 0.35,H_a:p0.35; with the samplen=281andx=94. =.70 (d) Calculate the test statisticzused in testingH_o:p= 0.90,H_a:p> 0.90; with the samplen=548andx=520. =3.90