Cumulative relative frequency graph
Used to examine location within a distribution. Completed graph shows the accumulating percent of observations
Density curve
A curve that (a) is always on or above the horizontal axis, and (b) has exactly 1 area underneath it.
Mean of a density curve
Balance point
Median of a density curve
Equal areas point
Normal Distribution
Is completely specified by two numbers, mean ? and standard deviation ?.
Normal probability plot
Used to assess normality. If the points lie close to a line, the plot indicates that the data are approximately Normal.
Pth percentile
The value with percent of the observations less than it.
Standard Normal distribution
Has mean 0 and standard deviation 1
Standardized values (z-scores)
Tells how many standard deviations a data point is from mean
The 68-95-99.7 Rule
Also known as the "empirical rule.
Cumulative relative frequency graph
Used to examine location within a distribution. Completed graph shows the accumulating percent of observations
Density curve
A curve that (a) is always on or above the horizontal axis, and (b) has exactly 1 area underneath it.
Mean of a density curve
Balance point
Median of a density curve
Equal areas point
Normal Distribution
Is completely specified by two numbers, mean ? and standard deviation ?.
Normal probability plot
Used to assess normality. If the points lie close to a line, the plot indicates that the data are approximately Normal.
Pth percentile
The value with percent of the observations less than it.
Standard Normal distribution
Has mean 0 and standard deviation 1
Standardized values (z-scores)
Tells how many standard deviations a data point is from mean
The 68-95-99.7 Rule
Also known as the "empirical rule.