1. Find out the critical value z_{c }necessary to form confidence interval at the level of confidence shown below
c-=0.96
z_{c }= ?
(Round to two decimal places as required)
2. Find out the margin of error for the given values of c,s,and n
C = 0.90, s= 2.8 , n=36
E= ?
( Round to two decimal places as required)