describe Interpretation based on z-score in normal distribution.

a) For a normal distribution a negative value of z indicates

a.1) mistake has been made in computation, because z is always positive

a.2) the area corresponding to z is negative

a.3) the z is to the left of the mean

a.4) the z is to the right of the mean

b) The mean of a standard normal probability distribution

1) Is always equal to zero

2) Can be any value as long as it is positive c

3) An be any value

4) Is always greater than zero

b) A continuous random variable may assume

1) All values in an interval or collection of intervals

2) Only integer values in an interval or collection of intervals

3) Only fractional values in an interval or collection of intervals

4) All the positive integer values in an interval