The user has a choice of displaying one of two confidence
intervals -- CLI
and CLM. The CLI option is
often termed as the Interval Estimation Confidence Interval. The CLM option is the mean estimation
confidence interval. Both the CLI and CLM options can be
calculated at different significance levels by using the Options sub-menu.
The interval estimation of the mean of Y (CLI)
is the default. CLI presents the
confidence interval for the point estimate of Y (predicted
value) given the current values of X (each of the independent variables). The default confidence level is 95%, or an
alpha of 0.05. Interpret the confidence
interval as follows: On average, there
is 95% confidence that the predicted value lies between the lower and upper
computed confidence coefficients given the current values of the independent
variables. Stated differently, there is
a 5% chance that the predicted value is outside the computed confidence limits,
given the current values of the independent variables.
Occasionally, one would like to predict the mean of m
new observations on Y for a given level of X.
For this calculation, we assume that the actual value for Y is the mean
of m
individual values of Y. The user has
the ability to select different values of m by executing the solution command
sequence: CLM is NOT currently available.