A production process is considered in control if no more than 4% of the items produced are defective. Samples of size 150 are used for inspection process .

1. The standard error of the population in this case is

a. 0.0045

b. 0.0160

c. 0.0033

d. 0.0207

e.1.0035

2. The upper control limit is

a. 0.04985

b. 0.1072

c. 0.0720

d. 0.0880

e. 12.789

3. The lower control limit is

a. 0.0302

b. 0.1450

c. -0.008

d. 1.0207

e. 0.0000