Question

victoria is testing her hypothesis that if she flips a coin, then the coin will land on \heads\ rather than \tails.\ to test her hypothesis, she flipped the coin, and it landed on heads. she recorded her results in a notebook. leslie, victorias friend, is not so sure about victorias results and asks to see her procedures and data from her investigation. leslie decided to replicate this investigation, but she flipped the coin forty times instead of one. leslies results were much different from victorias results. leslies coin landed on \heads\ 18 times and landed on \tails\ 22 times. victoria flipped the coin once in her investigation. her results matched her original hypothesis. why should victoria repeat the investigation? to prove that the investigation is important. to be able to start another investigation. to learn why the hypothesis is correct. to make sure her results are reliable.

Explanation:

In scientific investigations, repeating an experiment helps ensure that the results are not due to random chance or errors in a single trial. By repeating, Victoria can check if her findings are consistent. If multiple trials (like Leslie's replication) give similar results, it increases confidence in the reliability of the data.

Answer:

To make sure her results are reliable.