Question

Amy is doing a science experiment on how a certain bacterium reacts to an antibiotic. She has 3 dishes of identical bacterium samples with 20 bacteria in each dish. She gives an antibiotic to all of the bacteria in one dish. All of the treated bacteria died, and the bacteria in the other two dishes survived.

Identify the sample size in the situation above.
40
60
20
3

Answer 1

@perl

Answer 2

3 dishes , and each dish has 20 bacteria. so there is a total of how many bacteria being studied?

Answer 3

60

Answer 4

60 was wrong

Answer 5

@jim_thompson5910 Yaas says it is wrong

Answer 6

then is it 20?

Answer 7

I clicked on 60 and it was wrong

Answer 8

It was 20

Answer 9

It was 20

Answer 10

ok

Answer 11

If it said treated sample, then yes it would be 20. But the sample also applies to the placebo too. So sadly they are mistaken.

Answer 12

Unless they are considering the bacteria in the 3 dishes to be the population and the 1 dish the sample. But honestly that doesn't make much sense and isn't helpful statistically in the real world.

Answer 13

yes