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For example, the terms $$\hat{y}_{i+4}$$ and $$\hat{y}_{i+5}$$ represent the predicted values for the 4th and 5th future time steps, respectively, relative to the current time step $$i$$. This notation is commonly used to represent specific sequence outputs in time-series forecasting and text generation tasks.

Example of a Sequence of Predicted Future Values

A model generates a sequence of predictions for four consecutive future time steps, starting from the current time step `i`. A junior analyst labels these predictions as: `ŷ_{i+1}`, `ŷ_{i+2}`, `ŷ_{i+4}`, `ŷ_{i+5}`. Identify the error in this sequence of labels and explain what the correct label for that position should be.

Correcting a Forecast Notation Error

Match each mathematical notation with its correct description, assuming '$i$' represents the current time step.

A financial model is used to predict a company's daily stock price. If today (Monday) is represented by the time step $i$, which of the following correctly represents the model's *predicted* stock price for Thursday of the same week?

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