In a normal distribution of 200 cases how many fall between Z = -1.5 and Z = +1.

In a normal distribution of 200 cases how many fall between Z = -1.5 and Z = +1.5?
a. 173
b. 87
c. 43
d. 27In a normal distribution what proportion of cases falls below Z = +1.40?
a. .4192
b. .0808
c. .9192
d. .5808In a normal distribution of 200 cases how many fall above Z = +1.25?
a. 39
b. 79
c. 21
d. 11In a normal distribution with a mean of 50 and a standard deviation of 10 what proportion of the cases falls above a score of 42?
a. .7881
b. .2119
c. .2881
d. .7119In a normal distribution with a mean of 50 and a standard deviation of 10 what proportion of cases falls between 45 and 55?
a. .3085
b. .3830
c. .6170
d. .1915In a normal distribution of 400 scores with a mean of 50 and a standard deviation of 10 how many cases fall between 50 and 60?
a. 98
b. 142
c. 68
d. 137In a normal distribution the bottom 75% of the cases fall below what Z score?
a. .50
b. .38
c. 1.28
d. .67