# Updating report model

(In some instances, frequentist statistics can work around this problem.For example, confidence intervals and prediction intervals in frequentist statistics when constructed from a normal distribution with unknown mean and variance are constructed using a Student's t-distribution.The more general results were obtained later by the statistician David A.

Doob in 1948, namely if the random variable in consideration has a finite probability space.This correctly estimates the variance, due to the fact that (1) the average of normally distributed random variables is also normally distributed; (2) the predictive distribution of a normally distributed data point with unknown mean and variance, using conjugate or uninformative priors, has a student's t-distribution.In Bayesian statistics, however, the posterior predictive distribution can always be determined exactly—or at least, to an arbitrary level of precision, when numerical methods are used.) Note that both types of predictive distributions have the form of a compound probability distribution (as does the marginal likelihood).Notes: We start reporting the nowcast for a reference quarter about one month before the quarter begins; we stop updating it about one month after the quarter closes.Colored bars reflect the impact of each broad category of data on the nowcast; the impact of specific data releases is shown in the accompanying table.