Question

Determine the are aunder the standard mnormal curve that lies to the left of
(a) Z= -1.68, (b) Z= -0.28,
(c) Z= -1.38, and (d) Z= 1.52

Answer 1

Find Z scores in table in back of your stats book labeled something like "area under normal curve".

Remember that "to the left" means values below that score. Also note that negative Z scores are below the mean.

Answer 2

Determine the area under the standard normal curve that lies between the following z scores. Use a table if necessary. Round your answer to four decimal places.

z = 0.36 and z = 1.93