Anewspaper posted this question on its web "how often do you seek medical information online? " of 1072 internet users who chose to respond, 38% of them responded with "frequently." what term is used to describe this type of survey in which the people surveyed consist of those who decided to respond? what is wrong with this type of sampling method? what term is used to describe this type of survey? select all that apply.

1. why is a frequency distribution useful? it allows researchers to see the "shape" of the data. it tells researchers how often the mean occurs in a set of data. it can visually identify the mean. it ignores outliers. 2. the is defined by its mean and standard deviation alone. normal distribution frequency distribution median distribution marginal distribution 3. approximately % of the data in a given sample falls within three standard deviations of the mean if it is normally distributed. 95 68 34 99 4. a data set is said to be if the mean of the data is greater than the median of the data. normally distributed frequency distributed right-skewed left-skewed