# Question: using a computer or calculator that provides proportions falling below...

###### Question details

Using a computer or calculator that provides proportions falling
below a specified *z*-score, determine the approximate
proportion for each of the following situations. In each case,
assume the values are approximately bell-shaped. (Round your
proportions to four decimal places.)

(a) The proportion of SAT scores falling below 430 for a group
with a mean of 500 and a standard deviation of 100.

______ (*z*-score)

______ (approximate proportion)

(b) The proportion of boys with heights below 36.4 inches for a
group with mean height of 34 inches and standard deviation of 1
inch.

______ (*z*-score)

______ (approximate proportion)

(c) The proportion of a large class that scored below you on a test
for which the mean was 75, the standard deviation was 8, and your
score was 77.

______ (*z*-score)

______ (approximate proportion)

(d) The proportion of a large class that scored below you on a test
for which the mean was 75, the standard deviation was 4, and your
score was 77.

______ (*z*-score)

______ (approximate proportion)