Calculate p-value for the following conditions and determine whether or not to reject the null hypothesis:

(a) one-tail test, zx¯=1.50\' tabindex="0">z¯x=1.50zx¯=1.50 and α=0.05\' tabindex="0">α=0.05α=0.05.

(b) one-tail test, zx¯=−2.75\' tabindex="0">z¯x=−2.75zx¯=−2.75 and α=0.02\' tabindex="0">α=0.02α=0.02.

(c) two-tail test, zbarx=2.60\' tabindex="0">zbarx=2.60zbarx=2.60 and α=0.05\' tabindex="0">α=0.05α=0.05.

(d) two-tail test, zx¯=−1.26\' tabindex="0">z¯x=−1.26zx¯=−1.26 and α=0.10\' tabindex="0">α=0.10α=0.10