Alma has developed a new kind of antibiotic. For the antibiotic to be sufficiently effective, it has to kill at least $90\%$ of bacteria when applied to a harmful bacteria culture. She applied her antibiotic to a petri dish full of harmful bacteria, waited for it to take effect, and then tried to estimate the percentage of dead bacteria in it.
She took a random sample of $300$ bacteria and found that $94\%$ of them were dead. Then she calculated the margin of error and found that the true percentage of dead bacteria is most likely to be above $90\%$.
**What type of statistical study did Alma use?**
[[☃ radio 1]]
**Is the study appropriate for the statistical questions it's supposed to answer?**
Mark the most suitable choice.
[[☃ radio 2]]