In a normal distribution the bottom 75% of the cases fall below what Z score? a.

In a normal distribution the bottom 75% of the cases fall below what Z score?
a. .50
b. .38
c. 1.28
d. .67In a normal distribution of 200 cases the bottom 40 cases fall below what Z score?
a. -.25
b. -.84
c. -.52
d. -.37In a normal distribution of 200 cases what Z score divides the top 20 cases from the bottom 180?
a. 1.28
b. .25
c. .84
d. 1.96In a normal distribution the most extreme 5% of the cases fall beyond Z =
a. +/- 1.64
b. +/- 2.58
c. +/- 1.96
d. +/- 1.80Each score in a random sampling distribution of the mean represents
a. a single individual
b. a random data point
c. a standard score
d. a sample meanWhich is not a characteristic of the sampling distribution of the mean?
a. its mean is the same as the mean of the population of scores
b. its standard deviation is greater than that of the population of scores
c. it tends to resemble the normal curve irrespective of the shape of the population of scores
d. its standard deviation changes with variation in sample sizeThe mean of the sampling distribution of means
a. increases as sample size increases
b. changes as the standard deviation of the population of scores is increased
c. changes from the population mean if the population is not normally distributed
d. is unaffected by any of the above