1. the expression p(z < 2.87) represents the area under the standard normal curve below a given value of z.

what is p(z < 2.87)?

a. 0.9979

b. 0.0027

c. 0.9973

d. 0.0021

2. the expression p(z > –0.87) represents the area under the standard normal curve above a given value of z.

what is p(z > –0.87)?

express your answer as a decimal to the nearest ten thousandth (four decimal places).

3. the scores on a law school entrance exam are normally distributed with a mean of 250 and a standard deviation of 50. suppose 320 students took the test.

approximately how many students scored above 284?

round your answer to the nearest whole number.

4. lengths of newborn girls are normally distributed with a mean of 49.2 cm and a standard deviation of 1.8 centimeters. consider a group of 2000 newborn girls. how many girls will be 51 centimeters or shorter?