name your newdata with the matching names in the terms of your model, newdata=data.frame(a=110), predict and other fitting functions have strange behaviour where they search the global environment if they cant find the right variables. As for trying to get standard errors, it is unlikely that going to unstructured would be helpful. If anything it would make the problem worse because an unstructured covariance matrix has many more parameters that require estimation. With cov(ind) the number of parameters to be estimated is just the number of random intercepts and slopes. Call that number p. With cov(uns) it is, p*(p-1)/2 ... In statistics the mean squared prediction error of a smoothing or curve fitting procedure is the expected value of the squared difference between the fitted values implied by the predictive function. ✪ Standard Error of the Estimate used in Regression Analysis (Mean Square Error).
The standard error of the individual (future) predicted value is If the predictor vector corresponds to an observation in the analysis data, then the raw residual for that observation and the standard error of the raw residual are defined as The studentized residual is the ratio of the raw residual and its estimated standard error.
Prediction Model: You can view the Legend, Coefficients and Statistics for the resulting prediction model. You can also change the model type in "Options" and observe how the prediction model results change within the tool. New in R21.042: adjusted R Squared can now be viewed alongside the standard R Squared calculation. The adjusted R squared ... Finally, a 95%‐confidence interval for our estimate or prediction is (the estimate or prediction itself) ± (~2)∙(the standard error of the estimate or prediction), or (the estimate or prediction itself) ± (the margin of error in the estimate or prediction).
The module also introduces the notion of errors, residuals and R-square in a regression model. Topics covered include: • Introducing the Linear Regression • Building a Regression Model and estimating it using Excel • Making inferences using the estimated model • Using the Regression model to make predictions • Errors, Residuals and R-square WEEK 2 Module 2: Regression Analysis ... A switch indicating if standard errors are required. scale: Scale parameter for std.err. calculation: df: Degrees of freedom for scale: interval: Type of interval calculation. level: Tolerance/confidence level: type: Type of prediction (response or model term). terms: If type="terms", which terms (default is all terms) na.action