true or false

1. The general shape of a positively skewed distribution is the same as the bell-shaped distribution.
2. For the histogram, the numbers on the x-axis are for the class midpoints of the classes in the frequency distribution.
3. The graph of the frequency polygon always intersects the x-axis at both ends.
4. To plot the value "8" on a stem-and-leaf plot, a "0" is used as the stem number and the "8" is used as the leaf number.