A test statistic calculation results in a value of z = 1.645.

a) Draw a standard normal curve and shade the area that corresponds to the p-value for a two-tailed test

b) Identify the part of the shaded area that corresponds to the evidence for H_A : > _0. For any positive value of z, what is the relationship between the one-tailed p-value and the two-tailed p-value for the alternative hypothesis?

c) How large must the test statistic be to have the one-tailed p-value equal to the two-tailed p-value for when z = 1.645?