Question

The following table shows the data of a random sample of fish collected from and later released into a lake:
How many bass are estimated to be present if a random sample of 1,500 fish is collected from the lake?



Type of Fish Bass Catfish Warmouth
Number of fish 60 70 20

Answer 1

(sample size) * (# bass) / (Total Fish)

Answer 2

Take the fraction that are bass, and multiply that by your sample size

Answer 3

60/1500?

Answer 4

Ok, in the sample, there are 60 bass and (60+70+20) = 150 total fish

Answer 5

the fraction that are bass is 60/150

Answer 6

or 2/5
or 40%

Answer 7

then add the total after?

Answer 8

If 1500 Fish are sampled, you would expect 40% to be bass

Answer 9

1500*0.4 = 600 estimated bass

Answer 10

This is what we did

\[\frac{ 60 }{ 60+70+20 } = \frac{ x }{ 1500 }\]

Answer 11

Just scaled up the sample size to 1500 from 150 with the same expectations on percent of bass

Answer 12

@DanJS how would I come to the total

Answer 13

600 would be the answer