1. Use a table of standard normal curve areas to find the following:

a. The area to the left of z = 1.88

b. The area to the right of z = 1.42

c. The area to the left of z = - 0.39

d. The area to the right of z = - 0.46

e. The area between z = - 1.22 and z = - 0.5

a) 0.969

b) 0.0778

c) 0.348

d) 0.677

e) 0.1973

Step-by-step explanation:

In the table of standard normal curve areas the area to the left of the z score represents the probability less than the z score. while, the area to the right of the z score represents the probability greater than the z score

a) The area to the left of z = 1.88

or

P (z < 1.88) = 0.969 [From table of standard normal curve areas]

b. The area to the right of z = 1.42

or

P (z > 1.42) = 0.0778 [From table of standard normal curve areas]

c. The area to the left of z = - 0.39

or

P (z < - 0.39) = 0.348 [From table of standard normal curve areas]

d. The area to the right of z = - 0.46

or

P (z > - 0.46) = 0.677 [From table of standard normal curve areas]

e. The area between z = - 1.22 and z = - 0.5

or

⇒ P (z < - 0.5) - P (z < - 1.22)

or

⇒ 0.3085375 - 0.1112324 [From table of standard normal curve areas]

= 0.1973