Find the following areas under the normal curve

A. -1.43 < z < 0.68

B. 0.58 < z < 1.74

C. -1.55 < z < 0.44

D. z > 1.34

2 find the standardized score (z-score) closest to the following percentiles

A. 35th percentile

B. First Quartile QI

C. The observation with 12% of the data falling above it


3. Given a normal distribution of heights of 5 year olds (in inches) with a mean of 36 and a standard deviation of 10, find the following areas under the curve:

A. x < 31 inches

B. x > 49 inches

C. 40 < x < 50 inches

D. 70% of 5 year olds are below what height?