1)Cumulative frequency graph of a continuous randome variable must have area equal to?

a) 2

b) 1

c) 0

d) 10

2) In a standard normal distribution the probability given in the table corresponding the z value -1.52 is

a) 0.0643

b) 0.0543

c) 0.0743

d) answer not given

3) Top 5% of a normal distribution is present on?

a) left tail

b) right tail

c) center

d) no where

4) X is a dataset having a normal distribution with mean=80 and standard deviation of 5 is given. What is the probability P(46

a) 0.00%

b) 1%

c) 50.00%

d) None of the above

need answers asap