💥 Q 79: Prep 3 Algebra Question Bank T1

a) The method of samples is suitable for all the following except ......

(a) examining a patient's blood

(b) knowing population

(c) checking the production of a factory

(d) finding out the ratio of existing gas somewhere

b) knowing population

MR/Nasef.N

b) Selecting a sample of layers of a statistical society is called ...... sample.

(a) random

(b) class (layer)

(c) deliberate

(d) bunch

b) class (layer)

MR/Nasef.N

c) A factory has 125 workers, 75 of them are technicians and 50 are engineers, it is wanted to take a sample of layers of size 50 individuals such that it represents each layer according to its size, then the number of engineers of the sample equals ......

(a) 30

(b) 20

(c) 25

(d) 15

b) 20