Which step is the same in the construction of a perpendicular line through a point on a line and the construction of a perpendicular line through a point off a line?

Create only one arc on the original line.
Create two arcs on the original line.
Place the compass on a point off the original line.
Place the compass on a point on the original line.

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