1, A random sample of 225 likely voters in one state finds 52% of them favor the incumbent candidate in an upcoming election. What is the 99% confidence interval for the proportion of voters that favor the incumbent candidate?

2, The critical value for a two-tailed hypothesis test with a level of significance of = 0.05 when a standardized test statistic has a standard normal distribution is z* = ?

3, Student's t-distribution looks much like the standard normal distribution, but with heavier tail areas. TRUE OR FALSE?

4, A hypothesis test is conducted with H0 : = 18 vs. Ha: > 18. Given that the population is normal and the sample finds x = 21.2, = 10, and n = 9 , the tail area of this test is P =?

5, A hypothesis test is conducted with H0 : = 46 vs. Ha: 46. The hypothesis test sample finds x = 47.2, s = 5, and n = 81. The tail area in this test is P =?