This option provides a set of procedures used in statistical analysis of the learning process. The general application of particular suboptions is:

**Burden **- inspecting the number items scheduled for repetition on particular days and which these items are.

**Monthly burden **- inspecting the number of items scheduled for repetition in particular months and years.

**Factor distribution**- inspecting the number of items falling into particular difficulty categories.

**Interval distribution **- inspecting the number of items falling into particular current interval categories.

**Forgetting curve **- inspecting the current approximation of forgetting curves for particular entries of OF/RF-matrices (use arrow keys to move between particular curves).

**Advanced : Retention factors **- inspecting the matrix of retention factors as well as the corresponding forgetting curves.

**Advanced : Optimal factors **- inspecting the tabular form of the function of optimal intervals (matrix of optimal factors).

**Advanced : Optimal intervals **- inspecting the average values of intervals used in repetitions of items of varying difficulty.

**Advanced : Retention** - inspecting the values of retention at repetitions for particular E-factor and repetition number categories.

**Advanced : Cases **- inspecting the number of repetition cases that have been used to compute particular entries of the OF matrix displayed by the option Optimal factors.

**Advanced : Retention factors 3D **- inspecting the matrix of retention factors in three dimensions.

**Advanced : Optimal factors 3D**- inspecting the function of optimal intervals (matrix of optimal factors) in three dimensions.

**Advanced : Retention** **3D **- inspecting 3-dimensional representation of retention at repetitions for particular E-factor and repetition number categories.

**Advanced : Cases 3D **- inspecting 3-dimensional representation of repetition cases that have been used to compute particular entries of the OF matrix displayed by the option Optimal factors.