left sided or right sided?

CFA Level I
#1

Is there a simple explanation as to whether a test needs to be left sided or right sided in case of a <> test??? Thanks very much

#2

less than -> left side more than -> right side st norm distribution has mean of 0

#3

a <> test is a two-sided test…

#4

is it? i think <> is meant as more/less not equal/not equal