18.) suppose that the scores of architects on a particular creativity test are normally distributed. using a normal curve table what percentage of architects have z scores (a) above .10 (b) below .10 (c) above .20 (d) below .20 (e) above 1.10 (f) below 1.10 (g) above -.10 (h) below -.10?

19.) in the example in problem 18 using a normal curve table what is the minimum z score an architect can have on the creativity test to be in the (a) top 50% (b) top 40% (c) top 60% and (e) top 20%?

20.) In the example in problem 18 assume that the mean is 300 and the standard deviation is 25. using a normal curve table what scores would be the top and bottom scores to find (b) the middle of 90% of architects and (c) the middle 99% of architects?