A biologist is conducting research on four different types of fish found in a local lake. The numbers of each type are shown in the table.

She plans to use a stratified sampling method in which 20% of the total population is included in the studies. How many yellow perch will be in her sample?

6
12
18
24

Question

A biologist is conducting research on four different types of fish found in a local lake. The numbers of each type are shown in the table.

She plans to use a stratified sampling method in  which 20% of the total population is included in the studies. How many yellow perch will be in her sample?

6
12
18
24

faman39 · Answer

attachment

anonymous · Answer

he plans to use a stratified sampling method in which _________ of the total population is included in the studies. How many yellow perch will be in her sample?

anonymous · Answer

are you missing something in your post?

faman39 · Answer

No, i put the attachment, its there

anonymous · Answer

I see the attachment, that's not what I mean.  your sentence is incomplete.  We need to know how much of the total population is included.  Re-read your question.

faman39 · Answer

@cfraser007

anonymous · Answer

humm... @eseidl is right!... something is missing after "She plans to use a stratified sampling method in which___"

faman39 · Answer

@eseidl i correct that now, can u see it now

anonymous · Answer

ah, that helps.  So take 20% of the number of yellow perch.  So, 120*0.2=24

faman39 · Answer

Thank u ! thanks everyone to come n help me :)