Q1) In a data table, two rows are proportional to each other. Suppose that we run CA on this data table. What will be the distance between the points representing these two rows (in the N_I space)?
we cannot answer
the ratio between these 2 rows
0
the number of columns

Q2) In CA (tick the correct answer or answers),
if two rows are identical, they will have the same coordinates
if two rows are proportional, they will have the same coordinates
if a row and a column are identical, they will have the same coordinates
if a row is proportional to a row marginal, it will be found at the center of the point cloud

Q3) In a data table, suppose that all rows are proportional to each other. We run CA on this table. What will be the total inertia of this table?
0
the number of columns
the number of rows
the minimum between the number of rows and the number of columns
the minimum between the number of rows and the number of columns minus 1

Q4) For each assertion, tick if true.
the inertia of the point cloud of the rows is equal to phi²
the inertia of the point cloud of the rows is equal to chi² divided by the sum of the table entries
the inertia of the point cloud of the rows is equal to the inertia of the point cloud of the columns
the inertia of the point cloud of the rows is equal to the number of columns

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