UPSC CDS Math Statistics Questions

Remember:
A frequency polygon is a line graph that isdrawn by joining points given by the class mid-points and classfrequencies.
So, the original frequency distribution can be reconstructed from the frequency polygon.
Hence, statement 1 is correct
Remember:
The frequency polygon touches the x-axis at its extreme right and extreme left. These correspond to the midpoints of two class intervals of zero frequency on the x-axis, one adjacent to the first on its left and one adjacent to the last on its right.