Question

3. A population is 30% male and 70% female. A stratified sample of 30 students should contain _____ males.

Answer 1

Let's begin by listing out the information given to us:

Male = 30%

Female = 70%

Sample = 30

A stratified sample is one that ensures that the subgroup of a population is represented in equal measure in the sample

The sample will contain this number of males: 30% * 30

`\begin{gathered} (30)/(100)\cdot30=(900)/(100)=9 \\ =9males \end{gathered}`