a researcher wants to know the opinions of people in a state have about filling out surveys. the researcher asks the first 30 people who volunteer to take a survey, "do you think surveys are a useful took for gathering information? "

describe the population.
ex: if a school reporter surveys every 5th student who walks in the building, to describe the population, you would say that the population consists of students.

The population consists of volunteers in a certain state.

The problem mentions that volunteers took the survey, as well that the survey is meant to find the opinions of people in a certain state.

an advantage of the standard deviation is that it increases as the dispersion of the data increases. e. the interquartile range is preferred when the data are not skewed or no have outliers. an advantage of the standard deviation is that it uses all the observations in its computation.