Ument will The diagram shows a circle, center O.
Chord AB and diameter CD are parallel.
Arc AB subtends an angle of 78° at O.
What is the size of the angle arc AC
subtends at O?
A.) 24°
C.) 51°
B.) 45°
D.) 78°

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