2.2 histograms

histogram

graph consisting of bars of equal width drawn adjacent to each other

relative frequency histogram

histogram that has the same shape and horizontal scale as a histogram, but the vertical scale is marked with relative frequencies instead of actual frequencies

midpoints

values in between of each class width

CVDOT

Center of data, Variation, shape of Distribution, Outliers, and Time

normal distribution shape

histogram is bell-shaped roughly-

skewed right

(positively skewed) has a longer right tail

skewed left

negative skewed, longer left tail

uniform distribution

represents equal likelihood of all outcomes within a specific range

normal distribution on a plot graph

the pattern of points is reasonably close to a straight line