Identify a pair of skew segments in the diagram. The figure shows two equal rectangles A E H D and B F G C in a space. The rectangles are located on parallel planes. Vertex A corresponds to vertex B. Vertex E corresponds to vertex F. Vertex H corresponds to vertex G. Vertex D corresponds to vertex C. The corresponding vertices are connected with segments. An angle between segment A B and segment A C measures 90 degrees. Segment C D is parallel to segment G H.

CB and HG
AB and EF
HD and EH
AD and BC

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