| Overview: INTERVALS Statement |
The INTERVALS statement tabulates various statistical intervals for selected process variables. The types of intervals you can request include
approximate simultaneous prediction intervals for future observations
prediction intervals for the mean of future observations
approximate statistical tolerance intervals that contain at least a specified proportion of the population
confidence intervals for the population mean
prediction intervals for the standard deviation of future observations
confidence intervals for the population standard deviation
These intervals are computed assuming the data are sampled from a normal population. See Hahn and Meeker (1991) for a detailed discussion of these intervals.
You can use options in the INTERVALS statement to
specify which intervals to compute
provide probability or confidence levels for intervals
suppress printing of output tables
create an output data set containing interval information
specify interval type (one-sided lower, one-sided upper, or two-sided)