Answer: a sample size of 300 people
Scientific research is the investigation or examination performed by applying systematic scientific methods to obtain, analyze, and interpret the data. The sample size of the population plays a crucial role in research.
The phrase that limits the accuracy of the research is:
Option A: A sample size of 300 people
Scientific studies are advantageous when:
It is conducted on large population size.
The number of individual users in the research is used to calculate the set of statistics.
The large sample size allows the scientist to better understand and average the values of data.
The large population size also helps in neglecting the errors, which can be frequent on the small population size.
The maximum size of the population is usually 10percent of the total population. It can be calculated as the total population of 200,000, the 10% will be 20,000.
Thus, for the scientific study conducted by Marcus, the sample size of 300 people will limit the accuracy of the experiment.